Two equations on the same line












6














I have seen some posts close to what I need, but not quite what I need.



I would like to produce two equations on the same line with one equation number adjusted to left and one to the right. Both equations should be multiline.



And I want to generate a tag for both equation labels.



So the output should look like what is produced by the code below.



begin{array}{llrr}
& a=b & x=y & \
(eq1) & c=d & y=z & (eq2) \
& e=f & u=v
end{array}









share|improve this question
























  • 1) Welcome. 2) Please provide a so-called MWE: tex.meta.stackexchange.com/questions/228. 3) Maybe you can provide a link to the close posts that you are referring to. 4) At least I have trouble understanding exactly what you want to achieve. Maybe you can draw an example/illustration by hand and provide the picture. 5) I also enjoyed the movie District 9 (assuming you are referring to it with your name) :).
    – Dr. Manuel Kuehner
    Dec 29 '18 at 14:00


















6














I have seen some posts close to what I need, but not quite what I need.



I would like to produce two equations on the same line with one equation number adjusted to left and one to the right. Both equations should be multiline.



And I want to generate a tag for both equation labels.



So the output should look like what is produced by the code below.



begin{array}{llrr}
& a=b & x=y & \
(eq1) & c=d & y=z & (eq2) \
& e=f & u=v
end{array}









share|improve this question
























  • 1) Welcome. 2) Please provide a so-called MWE: tex.meta.stackexchange.com/questions/228. 3) Maybe you can provide a link to the close posts that you are referring to. 4) At least I have trouble understanding exactly what you want to achieve. Maybe you can draw an example/illustration by hand and provide the picture. 5) I also enjoyed the movie District 9 (assuming you are referring to it with your name) :).
    – Dr. Manuel Kuehner
    Dec 29 '18 at 14:00
















6












6








6


0





I have seen some posts close to what I need, but not quite what I need.



I would like to produce two equations on the same line with one equation number adjusted to left and one to the right. Both equations should be multiline.



And I want to generate a tag for both equation labels.



So the output should look like what is produced by the code below.



begin{array}{llrr}
& a=b & x=y & \
(eq1) & c=d & y=z & (eq2) \
& e=f & u=v
end{array}









share|improve this question















I have seen some posts close to what I need, but not quite what I need.



I would like to produce two equations on the same line with one equation number adjusted to left and one to the right. Both equations should be multiline.



And I want to generate a tag for both equation labels.



So the output should look like what is produced by the code below.



begin{array}{llrr}
& a=b & x=y & \
(eq1) & c=d & y=z & (eq2) \
& e=f & u=v
end{array}






equations line






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited Dec 30 '18 at 0:44









Peter Mortensen

54536




54536










asked Dec 29 '18 at 13:45









district9

312




312












  • 1) Welcome. 2) Please provide a so-called MWE: tex.meta.stackexchange.com/questions/228. 3) Maybe you can provide a link to the close posts that you are referring to. 4) At least I have trouble understanding exactly what you want to achieve. Maybe you can draw an example/illustration by hand and provide the picture. 5) I also enjoyed the movie District 9 (assuming you are referring to it with your name) :).
    – Dr. Manuel Kuehner
    Dec 29 '18 at 14:00




















  • 1) Welcome. 2) Please provide a so-called MWE: tex.meta.stackexchange.com/questions/228. 3) Maybe you can provide a link to the close posts that you are referring to. 4) At least I have trouble understanding exactly what you want to achieve. Maybe you can draw an example/illustration by hand and provide the picture. 5) I also enjoyed the movie District 9 (assuming you are referring to it with your name) :).
    – Dr. Manuel Kuehner
    Dec 29 '18 at 14:00


















1) Welcome. 2) Please provide a so-called MWE: tex.meta.stackexchange.com/questions/228. 3) Maybe you can provide a link to the close posts that you are referring to. 4) At least I have trouble understanding exactly what you want to achieve. Maybe you can draw an example/illustration by hand and provide the picture. 5) I also enjoyed the movie District 9 (assuming you are referring to it with your name) :).
– Dr. Manuel Kuehner
Dec 29 '18 at 14:00






1) Welcome. 2) Please provide a so-called MWE: tex.meta.stackexchange.com/questions/228. 3) Maybe you can provide a link to the close posts that you are referring to. 4) At least I have trouble understanding exactly what you want to achieve. Maybe you can draw an example/illustration by hand and provide the picture. 5) I also enjoyed the movie District 9 (assuming you are referring to it with your name) :).
– Dr. Manuel Kuehner
Dec 29 '18 at 14:00












3 Answers
3






active

oldest

votes


















7














I propose this solution, with a code borrowed on this site from @DavidCarlisle:



documentclass{article}
usepackage[utf8]{inputenc}%
usepackage{tabularx}
usepackage{mathtools, nccmath}

makeatletter
newcommand{leqnomode}{tagsleft@trueletveqno@@leqno}%
newcommand{reqnomode}{tagsleft@falseletveqno@@eqno}%
newcommand*{compress}{@minipagetrue}
makeatother

begin{document}

Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text.

{centeringcompress
begin{tabularx}{linewidth}{>{leqnomode}XX}
begin{equation}
begin{aligned}
a & =b \
c & =d \
e & =f
end{aligned}
end{equation}
&
begin{equation}
begin{aligned}
x & =y \
y & =z \
u & =v
end{aligned}
end{equation}
end{tabularx} vspace{-baselineskip}}

Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text.

end{document}


enter image description here






share|improve this answer





















  • Thank you. Nice to have all these options.
    – district9
    Dec 29 '18 at 17:33



















6














Like this:



Enter image description here



documentclass{article}
usepackage{tabularx}
newcolumntype{C}{>{centeringarraybackslash}X}
usepackage{amsmath}

%---------------- show page layout. don't use in a real document!
usepackage{showframe}
renewcommandShowFrameLinethickness{0.15pt}
renewcommand*ShowFrameColor{color{red}}
%---------------------------------------------------------------%
usepackage{lipsum}

begin{document}
lipsum*[66]
begin{center}
begin{tabularx}{linewidth}{@{} lCCr @{}}
refstepcounter{equation}
(theequation)label{eq:left}
& $begin{aligned}
a & = b \
c & = d
end{aligned}$
& $begin{aligned}
x & = y \
z & = w
end{aligned}$
& refstepcounter{equation}
(theequation)label{eq:right}
end{tabularx}
end{center}
dots, see eqref{eq:left} and eqref{eq:right} dots
lipsum*[66]
end{document}


Addendum: I figured out how to use my own tags for equations:



documentclass{article}

usepackage{amsmath}
makeatletter
newcommand{leqnomode}{tagsleft@true}
newcommand{reqnomode}{tagsleft@false}
makeatother

%---------------- show page layout. don't use in a real document!
usepackage{showframe}
renewcommandShowFrameLinethickness{0.15pt}
renewcommand*ShowFrameColor{color{red}}
%---------------------------------------------------------------%
usepackage{lipsum}

begin{document}
lipsum*[66]
begin{center}
vspace{-baselineskip}
begin{minipage}{0.5linewidth}leqnomode
begin{equation}label{eq:left}
begin{split}
a & = b \
c & = d
end{split}tag{*}
end{equation}
end{minipage}begin{minipage}{0.5linewidth}
begin{equation}label{eq:right}
begin{split}
x & = y \
z & = uvw
end{split}tag{**}
end{equation}
end{minipage}
end{center}
dots, see eqref{eq:left} and eqref{eq:right} dots
lipsum*[66]
end{document}


Enter image description here






share|improve this answer























  • +1: So there is no pre-defined environment for this kind of equation layout?
    – Dr. Manuel Kuehner
    Dec 29 '18 at 14:48










  • Thank you, this works. One more thing I need is: I want to define my own tags, say myeq1" and myeq2" to show up in place of (1) and (2). So far I could not figure out where to insert tag{myeq1} and tag{myeq2} without getting an error message from Latex.
    – district9
    Dec 29 '18 at 14:54










  • @district9, using tag{...} command is not possible here. you can insert in place of the theequation the content of tag, however, tags is not possible to cite in text.
    – Zarko
    Dec 29 '18 at 15:07










  • @Zarko: Thank you. Well, in my paper the tag would be essential, and I would even want to use it with hypperref. (If I click on an equation number, then I should be taken to the equation).
    – district9
    Dec 29 '18 at 15:21










  • @district9, see edited answer.
    – Zarko
    Dec 29 '18 at 15:49



















3














I'm not sure it is a good idea.



documentclass{article}
usepackage{amsmath}
usepackage{array}
usepackage{lipsum} % for context

newenvironment{doublynumberedequation}[2]
{%
unskip
refstepcounter{equation}label{#1}%
refstepcounter{equation}label{#2}%
defsecondlabel{#2}%
begin{equation*}
begin{tabular*}{displaywidth}{
@{extracolsep{stretch{1}}}
l
>{$displaystyle}c<{$}
@{extracolsep{stretch{2}}}
>{$displaystyle}c<{$}
@{extracolsep{stretch{1}}}
r
@{}
}
eqref{#1} &
}
{& eqref{secondlabel}end{tabular*}end{equation*}}

begin{document}

lipsum*[4]
begin{doublynumberedequation}{left}{right}% use two meaningful labels
begin{aligned}
a&=b \
c&=d \
e&=f
end{aligned}
&
begin{aligned}
x&=y \
y&=z \
u&=v
end{aligned}
end{doublynumberedequation}
lipsum[5]

end{document}


enter image description here






share|improve this answer





















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    3 Answers
    3






    active

    oldest

    votes








    3 Answers
    3






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    7














    I propose this solution, with a code borrowed on this site from @DavidCarlisle:



    documentclass{article}
    usepackage[utf8]{inputenc}%
    usepackage{tabularx}
    usepackage{mathtools, nccmath}

    makeatletter
    newcommand{leqnomode}{tagsleft@trueletveqno@@leqno}%
    newcommand{reqnomode}{tagsleft@falseletveqno@@eqno}%
    newcommand*{compress}{@minipagetrue}
    makeatother

    begin{document}

    Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text.

    {centeringcompress
    begin{tabularx}{linewidth}{>{leqnomode}XX}
    begin{equation}
    begin{aligned}
    a & =b \
    c & =d \
    e & =f
    end{aligned}
    end{equation}
    &
    begin{equation}
    begin{aligned}
    x & =y \
    y & =z \
    u & =v
    end{aligned}
    end{equation}
    end{tabularx} vspace{-baselineskip}}

    Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text.

    end{document}


    enter image description here






    share|improve this answer





















    • Thank you. Nice to have all these options.
      – district9
      Dec 29 '18 at 17:33
















    7














    I propose this solution, with a code borrowed on this site from @DavidCarlisle:



    documentclass{article}
    usepackage[utf8]{inputenc}%
    usepackage{tabularx}
    usepackage{mathtools, nccmath}

    makeatletter
    newcommand{leqnomode}{tagsleft@trueletveqno@@leqno}%
    newcommand{reqnomode}{tagsleft@falseletveqno@@eqno}%
    newcommand*{compress}{@minipagetrue}
    makeatother

    begin{document}

    Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text.

    {centeringcompress
    begin{tabularx}{linewidth}{>{leqnomode}XX}
    begin{equation}
    begin{aligned}
    a & =b \
    c & =d \
    e & =f
    end{aligned}
    end{equation}
    &
    begin{equation}
    begin{aligned}
    x & =y \
    y & =z \
    u & =v
    end{aligned}
    end{equation}
    end{tabularx} vspace{-baselineskip}}

    Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text.

    end{document}


    enter image description here






    share|improve this answer





















    • Thank you. Nice to have all these options.
      – district9
      Dec 29 '18 at 17:33














    7












    7








    7






    I propose this solution, with a code borrowed on this site from @DavidCarlisle:



    documentclass{article}
    usepackage[utf8]{inputenc}%
    usepackage{tabularx}
    usepackage{mathtools, nccmath}

    makeatletter
    newcommand{leqnomode}{tagsleft@trueletveqno@@leqno}%
    newcommand{reqnomode}{tagsleft@falseletveqno@@eqno}%
    newcommand*{compress}{@minipagetrue}
    makeatother

    begin{document}

    Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text.

    {centeringcompress
    begin{tabularx}{linewidth}{>{leqnomode}XX}
    begin{equation}
    begin{aligned}
    a & =b \
    c & =d \
    e & =f
    end{aligned}
    end{equation}
    &
    begin{equation}
    begin{aligned}
    x & =y \
    y & =z \
    u & =v
    end{aligned}
    end{equation}
    end{tabularx} vspace{-baselineskip}}

    Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text.

    end{document}


    enter image description here






    share|improve this answer












    I propose this solution, with a code borrowed on this site from @DavidCarlisle:



    documentclass{article}
    usepackage[utf8]{inputenc}%
    usepackage{tabularx}
    usepackage{mathtools, nccmath}

    makeatletter
    newcommand{leqnomode}{tagsleft@trueletveqno@@leqno}%
    newcommand{reqnomode}{tagsleft@falseletveqno@@eqno}%
    newcommand*{compress}{@minipagetrue}
    makeatother

    begin{document}

    Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text. Some text.

    {centeringcompress
    begin{tabularx}{linewidth}{>{leqnomode}XX}
    begin{equation}
    begin{aligned}
    a & =b \
    c & =d \
    e & =f
    end{aligned}
    end{equation}
    &
    begin{equation}
    begin{aligned}
    x & =y \
    y & =z \
    u & =v
    end{aligned}
    end{equation}
    end{tabularx} vspace{-baselineskip}}

    Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text. Some more text.

    end{document}


    enter image description here







    share|improve this answer












    share|improve this answer



    share|improve this answer










    answered Dec 29 '18 at 15:26









    Bernard

    166k769194




    166k769194












    • Thank you. Nice to have all these options.
      – district9
      Dec 29 '18 at 17:33


















    • Thank you. Nice to have all these options.
      – district9
      Dec 29 '18 at 17:33
















    Thank you. Nice to have all these options.
    – district9
    Dec 29 '18 at 17:33




    Thank you. Nice to have all these options.
    – district9
    Dec 29 '18 at 17:33











    6














    Like this:



    Enter image description here



    documentclass{article}
    usepackage{tabularx}
    newcolumntype{C}{>{centeringarraybackslash}X}
    usepackage{amsmath}

    %---------------- show page layout. don't use in a real document!
    usepackage{showframe}
    renewcommandShowFrameLinethickness{0.15pt}
    renewcommand*ShowFrameColor{color{red}}
    %---------------------------------------------------------------%
    usepackage{lipsum}

    begin{document}
    lipsum*[66]
    begin{center}
    begin{tabularx}{linewidth}{@{} lCCr @{}}
    refstepcounter{equation}
    (theequation)label{eq:left}
    & $begin{aligned}
    a & = b \
    c & = d
    end{aligned}$
    & $begin{aligned}
    x & = y \
    z & = w
    end{aligned}$
    & refstepcounter{equation}
    (theequation)label{eq:right}
    end{tabularx}
    end{center}
    dots, see eqref{eq:left} and eqref{eq:right} dots
    lipsum*[66]
    end{document}


    Addendum: I figured out how to use my own tags for equations:



    documentclass{article}

    usepackage{amsmath}
    makeatletter
    newcommand{leqnomode}{tagsleft@true}
    newcommand{reqnomode}{tagsleft@false}
    makeatother

    %---------------- show page layout. don't use in a real document!
    usepackage{showframe}
    renewcommandShowFrameLinethickness{0.15pt}
    renewcommand*ShowFrameColor{color{red}}
    %---------------------------------------------------------------%
    usepackage{lipsum}

    begin{document}
    lipsum*[66]
    begin{center}
    vspace{-baselineskip}
    begin{minipage}{0.5linewidth}leqnomode
    begin{equation}label{eq:left}
    begin{split}
    a & = b \
    c & = d
    end{split}tag{*}
    end{equation}
    end{minipage}begin{minipage}{0.5linewidth}
    begin{equation}label{eq:right}
    begin{split}
    x & = y \
    z & = uvw
    end{split}tag{**}
    end{equation}
    end{minipage}
    end{center}
    dots, see eqref{eq:left} and eqref{eq:right} dots
    lipsum*[66]
    end{document}


    Enter image description here






    share|improve this answer























    • +1: So there is no pre-defined environment for this kind of equation layout?
      – Dr. Manuel Kuehner
      Dec 29 '18 at 14:48










    • Thank you, this works. One more thing I need is: I want to define my own tags, say myeq1" and myeq2" to show up in place of (1) and (2). So far I could not figure out where to insert tag{myeq1} and tag{myeq2} without getting an error message from Latex.
      – district9
      Dec 29 '18 at 14:54










    • @district9, using tag{...} command is not possible here. you can insert in place of the theequation the content of tag, however, tags is not possible to cite in text.
      – Zarko
      Dec 29 '18 at 15:07










    • @Zarko: Thank you. Well, in my paper the tag would be essential, and I would even want to use it with hypperref. (If I click on an equation number, then I should be taken to the equation).
      – district9
      Dec 29 '18 at 15:21










    • @district9, see edited answer.
      – Zarko
      Dec 29 '18 at 15:49
















    6














    Like this:



    Enter image description here



    documentclass{article}
    usepackage{tabularx}
    newcolumntype{C}{>{centeringarraybackslash}X}
    usepackage{amsmath}

    %---------------- show page layout. don't use in a real document!
    usepackage{showframe}
    renewcommandShowFrameLinethickness{0.15pt}
    renewcommand*ShowFrameColor{color{red}}
    %---------------------------------------------------------------%
    usepackage{lipsum}

    begin{document}
    lipsum*[66]
    begin{center}
    begin{tabularx}{linewidth}{@{} lCCr @{}}
    refstepcounter{equation}
    (theequation)label{eq:left}
    & $begin{aligned}
    a & = b \
    c & = d
    end{aligned}$
    & $begin{aligned}
    x & = y \
    z & = w
    end{aligned}$
    & refstepcounter{equation}
    (theequation)label{eq:right}
    end{tabularx}
    end{center}
    dots, see eqref{eq:left} and eqref{eq:right} dots
    lipsum*[66]
    end{document}


    Addendum: I figured out how to use my own tags for equations:



    documentclass{article}

    usepackage{amsmath}
    makeatletter
    newcommand{leqnomode}{tagsleft@true}
    newcommand{reqnomode}{tagsleft@false}
    makeatother

    %---------------- show page layout. don't use in a real document!
    usepackage{showframe}
    renewcommandShowFrameLinethickness{0.15pt}
    renewcommand*ShowFrameColor{color{red}}
    %---------------------------------------------------------------%
    usepackage{lipsum}

    begin{document}
    lipsum*[66]
    begin{center}
    vspace{-baselineskip}
    begin{minipage}{0.5linewidth}leqnomode
    begin{equation}label{eq:left}
    begin{split}
    a & = b \
    c & = d
    end{split}tag{*}
    end{equation}
    end{minipage}begin{minipage}{0.5linewidth}
    begin{equation}label{eq:right}
    begin{split}
    x & = y \
    z & = uvw
    end{split}tag{**}
    end{equation}
    end{minipage}
    end{center}
    dots, see eqref{eq:left} and eqref{eq:right} dots
    lipsum*[66]
    end{document}


    Enter image description here






    share|improve this answer























    • +1: So there is no pre-defined environment for this kind of equation layout?
      – Dr. Manuel Kuehner
      Dec 29 '18 at 14:48










    • Thank you, this works. One more thing I need is: I want to define my own tags, say myeq1" and myeq2" to show up in place of (1) and (2). So far I could not figure out where to insert tag{myeq1} and tag{myeq2} without getting an error message from Latex.
      – district9
      Dec 29 '18 at 14:54










    • @district9, using tag{...} command is not possible here. you can insert in place of the theequation the content of tag, however, tags is not possible to cite in text.
      – Zarko
      Dec 29 '18 at 15:07










    • @Zarko: Thank you. Well, in my paper the tag would be essential, and I would even want to use it with hypperref. (If I click on an equation number, then I should be taken to the equation).
      – district9
      Dec 29 '18 at 15:21










    • @district9, see edited answer.
      – Zarko
      Dec 29 '18 at 15:49














    6












    6








    6






    Like this:



    Enter image description here



    documentclass{article}
    usepackage{tabularx}
    newcolumntype{C}{>{centeringarraybackslash}X}
    usepackage{amsmath}

    %---------------- show page layout. don't use in a real document!
    usepackage{showframe}
    renewcommandShowFrameLinethickness{0.15pt}
    renewcommand*ShowFrameColor{color{red}}
    %---------------------------------------------------------------%
    usepackage{lipsum}

    begin{document}
    lipsum*[66]
    begin{center}
    begin{tabularx}{linewidth}{@{} lCCr @{}}
    refstepcounter{equation}
    (theequation)label{eq:left}
    & $begin{aligned}
    a & = b \
    c & = d
    end{aligned}$
    & $begin{aligned}
    x & = y \
    z & = w
    end{aligned}$
    & refstepcounter{equation}
    (theequation)label{eq:right}
    end{tabularx}
    end{center}
    dots, see eqref{eq:left} and eqref{eq:right} dots
    lipsum*[66]
    end{document}


    Addendum: I figured out how to use my own tags for equations:



    documentclass{article}

    usepackage{amsmath}
    makeatletter
    newcommand{leqnomode}{tagsleft@true}
    newcommand{reqnomode}{tagsleft@false}
    makeatother

    %---------------- show page layout. don't use in a real document!
    usepackage{showframe}
    renewcommandShowFrameLinethickness{0.15pt}
    renewcommand*ShowFrameColor{color{red}}
    %---------------------------------------------------------------%
    usepackage{lipsum}

    begin{document}
    lipsum*[66]
    begin{center}
    vspace{-baselineskip}
    begin{minipage}{0.5linewidth}leqnomode
    begin{equation}label{eq:left}
    begin{split}
    a & = b \
    c & = d
    end{split}tag{*}
    end{equation}
    end{minipage}begin{minipage}{0.5linewidth}
    begin{equation}label{eq:right}
    begin{split}
    x & = y \
    z & = uvw
    end{split}tag{**}
    end{equation}
    end{minipage}
    end{center}
    dots, see eqref{eq:left} and eqref{eq:right} dots
    lipsum*[66]
    end{document}


    Enter image description here






    share|improve this answer














    Like this:



    Enter image description here



    documentclass{article}
    usepackage{tabularx}
    newcolumntype{C}{>{centeringarraybackslash}X}
    usepackage{amsmath}

    %---------------- show page layout. don't use in a real document!
    usepackage{showframe}
    renewcommandShowFrameLinethickness{0.15pt}
    renewcommand*ShowFrameColor{color{red}}
    %---------------------------------------------------------------%
    usepackage{lipsum}

    begin{document}
    lipsum*[66]
    begin{center}
    begin{tabularx}{linewidth}{@{} lCCr @{}}
    refstepcounter{equation}
    (theequation)label{eq:left}
    & $begin{aligned}
    a & = b \
    c & = d
    end{aligned}$
    & $begin{aligned}
    x & = y \
    z & = w
    end{aligned}$
    & refstepcounter{equation}
    (theequation)label{eq:right}
    end{tabularx}
    end{center}
    dots, see eqref{eq:left} and eqref{eq:right} dots
    lipsum*[66]
    end{document}


    Addendum: I figured out how to use my own tags for equations:



    documentclass{article}

    usepackage{amsmath}
    makeatletter
    newcommand{leqnomode}{tagsleft@true}
    newcommand{reqnomode}{tagsleft@false}
    makeatother

    %---------------- show page layout. don't use in a real document!
    usepackage{showframe}
    renewcommandShowFrameLinethickness{0.15pt}
    renewcommand*ShowFrameColor{color{red}}
    %---------------------------------------------------------------%
    usepackage{lipsum}

    begin{document}
    lipsum*[66]
    begin{center}
    vspace{-baselineskip}
    begin{minipage}{0.5linewidth}leqnomode
    begin{equation}label{eq:left}
    begin{split}
    a & = b \
    c & = d
    end{split}tag{*}
    end{equation}
    end{minipage}begin{minipage}{0.5linewidth}
    begin{equation}label{eq:right}
    begin{split}
    x & = y \
    z & = uvw
    end{split}tag{**}
    end{equation}
    end{minipage}
    end{center}
    dots, see eqref{eq:left} and eqref{eq:right} dots
    lipsum*[66]
    end{document}


    Enter image description here







    share|improve this answer














    share|improve this answer



    share|improve this answer








    edited Dec 30 '18 at 0:03









    Peter Mortensen

    54536




    54536










    answered Dec 29 '18 at 14:39









    Zarko

    121k865158




    121k865158












    • +1: So there is no pre-defined environment for this kind of equation layout?
      – Dr. Manuel Kuehner
      Dec 29 '18 at 14:48










    • Thank you, this works. One more thing I need is: I want to define my own tags, say myeq1" and myeq2" to show up in place of (1) and (2). So far I could not figure out where to insert tag{myeq1} and tag{myeq2} without getting an error message from Latex.
      – district9
      Dec 29 '18 at 14:54










    • @district9, using tag{...} command is not possible here. you can insert in place of the theequation the content of tag, however, tags is not possible to cite in text.
      – Zarko
      Dec 29 '18 at 15:07










    • @Zarko: Thank you. Well, in my paper the tag would be essential, and I would even want to use it with hypperref. (If I click on an equation number, then I should be taken to the equation).
      – district9
      Dec 29 '18 at 15:21










    • @district9, see edited answer.
      – Zarko
      Dec 29 '18 at 15:49


















    • +1: So there is no pre-defined environment for this kind of equation layout?
      – Dr. Manuel Kuehner
      Dec 29 '18 at 14:48










    • Thank you, this works. One more thing I need is: I want to define my own tags, say myeq1" and myeq2" to show up in place of (1) and (2). So far I could not figure out where to insert tag{myeq1} and tag{myeq2} without getting an error message from Latex.
      – district9
      Dec 29 '18 at 14:54










    • @district9, using tag{...} command is not possible here. you can insert in place of the theequation the content of tag, however, tags is not possible to cite in text.
      – Zarko
      Dec 29 '18 at 15:07










    • @Zarko: Thank you. Well, in my paper the tag would be essential, and I would even want to use it with hypperref. (If I click on an equation number, then I should be taken to the equation).
      – district9
      Dec 29 '18 at 15:21










    • @district9, see edited answer.
      – Zarko
      Dec 29 '18 at 15:49
















    +1: So there is no pre-defined environment for this kind of equation layout?
    – Dr. Manuel Kuehner
    Dec 29 '18 at 14:48




    +1: So there is no pre-defined environment for this kind of equation layout?
    – Dr. Manuel Kuehner
    Dec 29 '18 at 14:48












    Thank you, this works. One more thing I need is: I want to define my own tags, say myeq1" and myeq2" to show up in place of (1) and (2). So far I could not figure out where to insert tag{myeq1} and tag{myeq2} without getting an error message from Latex.
    – district9
    Dec 29 '18 at 14:54




    Thank you, this works. One more thing I need is: I want to define my own tags, say myeq1" and myeq2" to show up in place of (1) and (2). So far I could not figure out where to insert tag{myeq1} and tag{myeq2} without getting an error message from Latex.
    – district9
    Dec 29 '18 at 14:54












    @district9, using tag{...} command is not possible here. you can insert in place of the theequation the content of tag, however, tags is not possible to cite in text.
    – Zarko
    Dec 29 '18 at 15:07




    @district9, using tag{...} command is not possible here. you can insert in place of the theequation the content of tag, however, tags is not possible to cite in text.
    – Zarko
    Dec 29 '18 at 15:07












    @Zarko: Thank you. Well, in my paper the tag would be essential, and I would even want to use it with hypperref. (If I click on an equation number, then I should be taken to the equation).
    – district9
    Dec 29 '18 at 15:21




    @Zarko: Thank you. Well, in my paper the tag would be essential, and I would even want to use it with hypperref. (If I click on an equation number, then I should be taken to the equation).
    – district9
    Dec 29 '18 at 15:21












    @district9, see edited answer.
    – Zarko
    Dec 29 '18 at 15:49




    @district9, see edited answer.
    – Zarko
    Dec 29 '18 at 15:49











    3














    I'm not sure it is a good idea.



    documentclass{article}
    usepackage{amsmath}
    usepackage{array}
    usepackage{lipsum} % for context

    newenvironment{doublynumberedequation}[2]
    {%
    unskip
    refstepcounter{equation}label{#1}%
    refstepcounter{equation}label{#2}%
    defsecondlabel{#2}%
    begin{equation*}
    begin{tabular*}{displaywidth}{
    @{extracolsep{stretch{1}}}
    l
    >{$displaystyle}c<{$}
    @{extracolsep{stretch{2}}}
    >{$displaystyle}c<{$}
    @{extracolsep{stretch{1}}}
    r
    @{}
    }
    eqref{#1} &
    }
    {& eqref{secondlabel}end{tabular*}end{equation*}}

    begin{document}

    lipsum*[4]
    begin{doublynumberedequation}{left}{right}% use two meaningful labels
    begin{aligned}
    a&=b \
    c&=d \
    e&=f
    end{aligned}
    &
    begin{aligned}
    x&=y \
    y&=z \
    u&=v
    end{aligned}
    end{doublynumberedequation}
    lipsum[5]

    end{document}


    enter image description here






    share|improve this answer


























      3














      I'm not sure it is a good idea.



      documentclass{article}
      usepackage{amsmath}
      usepackage{array}
      usepackage{lipsum} % for context

      newenvironment{doublynumberedequation}[2]
      {%
      unskip
      refstepcounter{equation}label{#1}%
      refstepcounter{equation}label{#2}%
      defsecondlabel{#2}%
      begin{equation*}
      begin{tabular*}{displaywidth}{
      @{extracolsep{stretch{1}}}
      l
      >{$displaystyle}c<{$}
      @{extracolsep{stretch{2}}}
      >{$displaystyle}c<{$}
      @{extracolsep{stretch{1}}}
      r
      @{}
      }
      eqref{#1} &
      }
      {& eqref{secondlabel}end{tabular*}end{equation*}}

      begin{document}

      lipsum*[4]
      begin{doublynumberedequation}{left}{right}% use two meaningful labels
      begin{aligned}
      a&=b \
      c&=d \
      e&=f
      end{aligned}
      &
      begin{aligned}
      x&=y \
      y&=z \
      u&=v
      end{aligned}
      end{doublynumberedequation}
      lipsum[5]

      end{document}


      enter image description here






      share|improve this answer
























        3












        3








        3






        I'm not sure it is a good idea.



        documentclass{article}
        usepackage{amsmath}
        usepackage{array}
        usepackage{lipsum} % for context

        newenvironment{doublynumberedequation}[2]
        {%
        unskip
        refstepcounter{equation}label{#1}%
        refstepcounter{equation}label{#2}%
        defsecondlabel{#2}%
        begin{equation*}
        begin{tabular*}{displaywidth}{
        @{extracolsep{stretch{1}}}
        l
        >{$displaystyle}c<{$}
        @{extracolsep{stretch{2}}}
        >{$displaystyle}c<{$}
        @{extracolsep{stretch{1}}}
        r
        @{}
        }
        eqref{#1} &
        }
        {& eqref{secondlabel}end{tabular*}end{equation*}}

        begin{document}

        lipsum*[4]
        begin{doublynumberedequation}{left}{right}% use two meaningful labels
        begin{aligned}
        a&=b \
        c&=d \
        e&=f
        end{aligned}
        &
        begin{aligned}
        x&=y \
        y&=z \
        u&=v
        end{aligned}
        end{doublynumberedequation}
        lipsum[5]

        end{document}


        enter image description here






        share|improve this answer












        I'm not sure it is a good idea.



        documentclass{article}
        usepackage{amsmath}
        usepackage{array}
        usepackage{lipsum} % for context

        newenvironment{doublynumberedequation}[2]
        {%
        unskip
        refstepcounter{equation}label{#1}%
        refstepcounter{equation}label{#2}%
        defsecondlabel{#2}%
        begin{equation*}
        begin{tabular*}{displaywidth}{
        @{extracolsep{stretch{1}}}
        l
        >{$displaystyle}c<{$}
        @{extracolsep{stretch{2}}}
        >{$displaystyle}c<{$}
        @{extracolsep{stretch{1}}}
        r
        @{}
        }
        eqref{#1} &
        }
        {& eqref{secondlabel}end{tabular*}end{equation*}}

        begin{document}

        lipsum*[4]
        begin{doublynumberedequation}{left}{right}% use two meaningful labels
        begin{aligned}
        a&=b \
        c&=d \
        e&=f
        end{aligned}
        &
        begin{aligned}
        x&=y \
        y&=z \
        u&=v
        end{aligned}
        end{doublynumberedequation}
        lipsum[5]

        end{document}


        enter image description here







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Dec 29 '18 at 16:08









        egreg

        710k8618853171




        710k8618853171






























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