Using numcases with cases












0















I have an equation like so:



   [ begin{cases}
Eqn1 &= 0,\
Eqn2 &= 0,
end{cases} iff
begin{cases}
Eqn3 &= 0,\
Eqn4 &= 0,\
Eqn5 &= 0.
end{cases}
]


This works all nice and good, however, I would like to numerate the "right side" of those (in this case 3) equations. Naively, I thought I could use numcases for the second "block", but of course this is good as numcases for some reason cannot be between [] or the-like.
Is there a way to do this?



Patrick










share|improve this question























  • Where did you get numcases? It isn't in amsmath or mathtools.

    – John Kormylo
    Feb 23 at 15:29
















0















I have an equation like so:



   [ begin{cases}
Eqn1 &= 0,\
Eqn2 &= 0,
end{cases} iff
begin{cases}
Eqn3 &= 0,\
Eqn4 &= 0,\
Eqn5 &= 0.
end{cases}
]


This works all nice and good, however, I would like to numerate the "right side" of those (in this case 3) equations. Naively, I thought I could use numcases for the second "block", but of course this is good as numcases for some reason cannot be between [] or the-like.
Is there a way to do this?



Patrick










share|improve this question























  • Where did you get numcases? It isn't in amsmath or mathtools.

    – John Kormylo
    Feb 23 at 15:29














0












0








0








I have an equation like so:



   [ begin{cases}
Eqn1 &= 0,\
Eqn2 &= 0,
end{cases} iff
begin{cases}
Eqn3 &= 0,\
Eqn4 &= 0,\
Eqn5 &= 0.
end{cases}
]


This works all nice and good, however, I would like to numerate the "right side" of those (in this case 3) equations. Naively, I thought I could use numcases for the second "block", but of course this is good as numcases for some reason cannot be between [] or the-like.
Is there a way to do this?



Patrick










share|improve this question














I have an equation like so:



   [ begin{cases}
Eqn1 &= 0,\
Eqn2 &= 0,
end{cases} iff
begin{cases}
Eqn3 &= 0,\
Eqn4 &= 0,\
Eqn5 &= 0.
end{cases}
]


This works all nice and good, however, I would like to numerate the "right side" of those (in this case 3) equations. Naively, I thought I could use numcases for the second "block", but of course this is good as numcases for some reason cannot be between [] or the-like.
Is there a way to do this?



Patrick







math-mode equations labels cases






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked Feb 23 at 15:21









Patrick.BPatrick.B

82




82













  • Where did you get numcases? It isn't in amsmath or mathtools.

    – John Kormylo
    Feb 23 at 15:29



















  • Where did you get numcases? It isn't in amsmath or mathtools.

    – John Kormylo
    Feb 23 at 15:29

















Where did you get numcases? It isn't in amsmath or mathtools.

– John Kormylo
Feb 23 at 15:29





Where did you get numcases? It isn't in amsmath or mathtools.

– John Kormylo
Feb 23 at 15:29










2 Answers
2






active

oldest

votes


















2














I'm not sure your readers will understand what the numbers refer to.



documentclass{article}
usepackage{empheq} % also loads amsmath

begin{document}

begin{empheq}[
left=
{begin{cases}
Eqn1 = 0,\
Eqn2 = 0,
end{cases}} iff
empheqlbrace
]{align}
Eqn3 &= 0,\
Eqn4 &= 0,\
Eqn5 &= 0.
end{empheq}

end{document}


The additional braces around begin{cases}...end{cases} are needed because there are commas in the code. Note that you shouldn't use &= inside cases (thanks to Bernard for noting).



enter image description here






share|improve this answer





















  • 1





    The spacing of = is not correct in the cases envritonment.

    – Bernard
    Feb 23 at 16:13











  • @Bernard Right. Fixed with acknowledgment.

    – egreg
    Feb 23 at 16:16











  • If the OP wants to get a proper space between system of equations I suggest follow this @egreg's answer: How to get rid of & in cases environment but still get the same space in the surroundings.

    – manooooh
    Feb 23 at 16:29





















1














To disambiguate to which equalities the numbers refer to, one may use theadjustwidth environment, to have the numbers closer. Also, one can nest cases in the left-side argument of numcases:



documentclass{article}
usepackage{cases}
usepackage{changepage}
usepackage{showframe}
renewcommand{ShowFrameLinethickness}{0.3pt}

begin{document}

begin{adjustwidth}{6em}{6em}
begin{numcases}
{begin{cases}
Eqn1 = 0,\
Eqn2 = 0,
end{cases} iff}
Eqn3 = 0,\
Eqn4 = 0,\
Eqn5 = 0.
end{numcases}
end{adjustwidth}

end{document}


enter image description here






share|improve this answer























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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    2














    I'm not sure your readers will understand what the numbers refer to.



    documentclass{article}
    usepackage{empheq} % also loads amsmath

    begin{document}

    begin{empheq}[
    left=
    {begin{cases}
    Eqn1 = 0,\
    Eqn2 = 0,
    end{cases}} iff
    empheqlbrace
    ]{align}
    Eqn3 &= 0,\
    Eqn4 &= 0,\
    Eqn5 &= 0.
    end{empheq}

    end{document}


    The additional braces around begin{cases}...end{cases} are needed because there are commas in the code. Note that you shouldn't use &= inside cases (thanks to Bernard for noting).



    enter image description here






    share|improve this answer





















    • 1





      The spacing of = is not correct in the cases envritonment.

      – Bernard
      Feb 23 at 16:13











    • @Bernard Right. Fixed with acknowledgment.

      – egreg
      Feb 23 at 16:16











    • If the OP wants to get a proper space between system of equations I suggest follow this @egreg's answer: How to get rid of & in cases environment but still get the same space in the surroundings.

      – manooooh
      Feb 23 at 16:29


















    2














    I'm not sure your readers will understand what the numbers refer to.



    documentclass{article}
    usepackage{empheq} % also loads amsmath

    begin{document}

    begin{empheq}[
    left=
    {begin{cases}
    Eqn1 = 0,\
    Eqn2 = 0,
    end{cases}} iff
    empheqlbrace
    ]{align}
    Eqn3 &= 0,\
    Eqn4 &= 0,\
    Eqn5 &= 0.
    end{empheq}

    end{document}


    The additional braces around begin{cases}...end{cases} are needed because there are commas in the code. Note that you shouldn't use &= inside cases (thanks to Bernard for noting).



    enter image description here






    share|improve this answer





















    • 1





      The spacing of = is not correct in the cases envritonment.

      – Bernard
      Feb 23 at 16:13











    • @Bernard Right. Fixed with acknowledgment.

      – egreg
      Feb 23 at 16:16











    • If the OP wants to get a proper space between system of equations I suggest follow this @egreg's answer: How to get rid of & in cases environment but still get the same space in the surroundings.

      – manooooh
      Feb 23 at 16:29
















    2












    2








    2







    I'm not sure your readers will understand what the numbers refer to.



    documentclass{article}
    usepackage{empheq} % also loads amsmath

    begin{document}

    begin{empheq}[
    left=
    {begin{cases}
    Eqn1 = 0,\
    Eqn2 = 0,
    end{cases}} iff
    empheqlbrace
    ]{align}
    Eqn3 &= 0,\
    Eqn4 &= 0,\
    Eqn5 &= 0.
    end{empheq}

    end{document}


    The additional braces around begin{cases}...end{cases} are needed because there are commas in the code. Note that you shouldn't use &= inside cases (thanks to Bernard for noting).



    enter image description here






    share|improve this answer















    I'm not sure your readers will understand what the numbers refer to.



    documentclass{article}
    usepackage{empheq} % also loads amsmath

    begin{document}

    begin{empheq}[
    left=
    {begin{cases}
    Eqn1 = 0,\
    Eqn2 = 0,
    end{cases}} iff
    empheqlbrace
    ]{align}
    Eqn3 &= 0,\
    Eqn4 &= 0,\
    Eqn5 &= 0.
    end{empheq}

    end{document}


    The additional braces around begin{cases}...end{cases} are needed because there are commas in the code. Note that you shouldn't use &= inside cases (thanks to Bernard for noting).



    enter image description here







    share|improve this answer














    share|improve this answer



    share|improve this answer








    edited Feb 23 at 16:16

























    answered Feb 23 at 15:52









    egregegreg

    723k8819173221




    723k8819173221








    • 1





      The spacing of = is not correct in the cases envritonment.

      – Bernard
      Feb 23 at 16:13











    • @Bernard Right. Fixed with acknowledgment.

      – egreg
      Feb 23 at 16:16











    • If the OP wants to get a proper space between system of equations I suggest follow this @egreg's answer: How to get rid of & in cases environment but still get the same space in the surroundings.

      – manooooh
      Feb 23 at 16:29
















    • 1





      The spacing of = is not correct in the cases envritonment.

      – Bernard
      Feb 23 at 16:13











    • @Bernard Right. Fixed with acknowledgment.

      – egreg
      Feb 23 at 16:16











    • If the OP wants to get a proper space between system of equations I suggest follow this @egreg's answer: How to get rid of & in cases environment but still get the same space in the surroundings.

      – manooooh
      Feb 23 at 16:29










    1




    1





    The spacing of = is not correct in the cases envritonment.

    – Bernard
    Feb 23 at 16:13





    The spacing of = is not correct in the cases envritonment.

    – Bernard
    Feb 23 at 16:13













    @Bernard Right. Fixed with acknowledgment.

    – egreg
    Feb 23 at 16:16





    @Bernard Right. Fixed with acknowledgment.

    – egreg
    Feb 23 at 16:16













    If the OP wants to get a proper space between system of equations I suggest follow this @egreg's answer: How to get rid of & in cases environment but still get the same space in the surroundings.

    – manooooh
    Feb 23 at 16:29







    If the OP wants to get a proper space between system of equations I suggest follow this @egreg's answer: How to get rid of & in cases environment but still get the same space in the surroundings.

    – manooooh
    Feb 23 at 16:29













    1














    To disambiguate to which equalities the numbers refer to, one may use theadjustwidth environment, to have the numbers closer. Also, one can nest cases in the left-side argument of numcases:



    documentclass{article}
    usepackage{cases}
    usepackage{changepage}
    usepackage{showframe}
    renewcommand{ShowFrameLinethickness}{0.3pt}

    begin{document}

    begin{adjustwidth}{6em}{6em}
    begin{numcases}
    {begin{cases}
    Eqn1 = 0,\
    Eqn2 = 0,
    end{cases} iff}
    Eqn3 = 0,\
    Eqn4 = 0,\
    Eqn5 = 0.
    end{numcases}
    end{adjustwidth}

    end{document}


    enter image description here






    share|improve this answer




























      1














      To disambiguate to which equalities the numbers refer to, one may use theadjustwidth environment, to have the numbers closer. Also, one can nest cases in the left-side argument of numcases:



      documentclass{article}
      usepackage{cases}
      usepackage{changepage}
      usepackage{showframe}
      renewcommand{ShowFrameLinethickness}{0.3pt}

      begin{document}

      begin{adjustwidth}{6em}{6em}
      begin{numcases}
      {begin{cases}
      Eqn1 = 0,\
      Eqn2 = 0,
      end{cases} iff}
      Eqn3 = 0,\
      Eqn4 = 0,\
      Eqn5 = 0.
      end{numcases}
      end{adjustwidth}

      end{document}


      enter image description here






      share|improve this answer


























        1












        1








        1







        To disambiguate to which equalities the numbers refer to, one may use theadjustwidth environment, to have the numbers closer. Also, one can nest cases in the left-side argument of numcases:



        documentclass{article}
        usepackage{cases}
        usepackage{changepage}
        usepackage{showframe}
        renewcommand{ShowFrameLinethickness}{0.3pt}

        begin{document}

        begin{adjustwidth}{6em}{6em}
        begin{numcases}
        {begin{cases}
        Eqn1 = 0,\
        Eqn2 = 0,
        end{cases} iff}
        Eqn3 = 0,\
        Eqn4 = 0,\
        Eqn5 = 0.
        end{numcases}
        end{adjustwidth}

        end{document}


        enter image description here






        share|improve this answer













        To disambiguate to which equalities the numbers refer to, one may use theadjustwidth environment, to have the numbers closer. Also, one can nest cases in the left-side argument of numcases:



        documentclass{article}
        usepackage{cases}
        usepackage{changepage}
        usepackage{showframe}
        renewcommand{ShowFrameLinethickness}{0.3pt}

        begin{document}

        begin{adjustwidth}{6em}{6em}
        begin{numcases}
        {begin{cases}
        Eqn1 = 0,\
        Eqn2 = 0,
        end{cases} iff}
        Eqn3 = 0,\
        Eqn4 = 0,\
        Eqn5 = 0.
        end{numcases}
        end{adjustwidth}

        end{document}


        enter image description here







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered Feb 23 at 16:23









        BernardBernard

        172k775203




        172k775203






























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