Double backslash on last line of matrix
up vote
7
down vote
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Is \ necessary on the final line of environments like matrix, align, and gather? For example, with amsmath,
[begin{bmatrix}
3 & 1\
2 & 4\
end{bmatrix}]
and
[begin{bmatrix}
3 & 1\
2 & 4
end{bmatrix}]
seem to produce the same output. But are they really the same? Is one preferable to the other, or is it a matter of taste? From my understanding, \ in one of these environments is used to separate lines, and there's nothing else to separate the final line from, so it's not necessary.
matrices
asked 7 hours ago
MathIsFun
505
add a comment |
up vote
7
down vote
favorite
Is \ necessary on the final line of environments like matrix, align, and gather? For example, with amsmath,
[begin{bmatrix}
3 & 1\
2 & 4\
end{bmatrix}]
and
[begin{bmatrix}
3 & 1\
2 & 4
end{bmatrix}]
seem to produce the same output. But are they really the same? Is one preferable to the other, or is it a matter of taste? From my understanding, \ in one of these environments is used to separate lines, and there's nothing else to separate the final line from, so it's not necessary.
matrices
asked 7 hours ago
MathIsFun
505
If it produces the same output, I guess there's no difference.
– Tvde1
7 hours ago
I think there's no rule for this. I think it depends on the implementation of the environment. Withalign, for instance, you get an undesired line if you add the\at the end.
– Phelype Oleinik
7 hours ago
add a comment |
up vote
7
down vote
favorite
up vote
7
down vote
favorite
Is \ necessary on the final line of environments like matrix, align, and gather? For example, with amsmath,
[begin{bmatrix}
3 & 1\
2 & 4\
end{bmatrix}]
and
[begin{bmatrix}
3 & 1\
2 & 4
end{bmatrix}]
seem to produce the same output. But are they really the same? Is one preferable to the other, or is it a matter of taste? From my understanding, \ in one of these environments is used to separate lines, and there's nothing else to separate the final line from, so it's not necessary.
matrices
asked 7 hours ago
MathIsFun
505
Is \ necessary on the final line of environments like matrix, align, and gather? For example, with amsmath,
[begin{bmatrix}
3 & 1\
2 & 4\
end{bmatrix}]
and
[begin{bmatrix}
3 & 1\
2 & 4
end{bmatrix}]
seem to produce the same output. But are they really the same? Is one preferable to the other, or is it a matter of taste? From my understanding, \ in one of these environments is used to separate lines, and there's nothing else to separate the final line from, so it's not necessary.
matrices
matrices
asked 7 hours ago
MathIsFun
505
asked 7 hours ago
MathIsFun
505
edited 7 hours ago
asked 7 hours ago
MathIsFun
505
asked 7 hours ago
MathIsFun
505
asked 7 hours ago
MathIsFun
505
505
If it produces the same output, I guess there's no difference.
– Tvde1
7 hours ago
I think there's no rule for this. I think it depends on the implementation of the environment. Withalign, for instance, you get an undesired line if you add the\at the end.
– Phelype Oleinik
7 hours ago
add a comment |
If it produces the same output, I guess there's no difference.
– Tvde1
7 hours ago
I think there's no rule for this. I think it depends on the implementation of the environment. Withalign, for instance, you get an undesired line if you add the\at the end.
– Phelype Oleinik
7 hours ago
If it produces the same output, I guess there's no difference.
– Tvde1
7 hours ago
If it produces the same output, I guess there's no difference.
– Tvde1
7 hours ago
I think there's no rule for this. I think it depends on the implementation of the environment. With
align, for instance, you get an undesired line if you add the \ at the end.– Phelype Oleinik
7 hours ago
I think there's no rule for this. I think it depends on the implementation of the environment. With
align, for instance, you get an undesired line if you add the \ at the end.– Phelype Oleinik
7 hours ago
add a comment |
1 Answer
1
active
oldest
votes
up vote
7
down vote
accepted
There is no difference at all for bmatrix. There is for align.
Any array or tabular allows a trailing \; it is obviously mandatory if hline is needed at the bottom, but otherwise omitting it is safe.
Since Xmatrix (where X stands for noting, p, b, B, v or V) is array in disguise, the same applies. Also cases falls in this class.
It's very different with align, alignat, xalignat, flalign and gather (or *-forms thereof), where a trailing \ would produce a new empty row (with the equation number in the case of no *), so it must be avoided.
As a habit, I tend to avoid the trailing \ in Xmatrix, just for symmetry with the alignment environments mentioned above.
answered 6 hours ago
egreg
696k8518483111
add a comment |
1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
7
down vote
accepted
There is no difference at all for bmatrix. There is for align.
Any array or tabular allows a trailing \; it is obviously mandatory if hline is needed at the bottom, but otherwise omitting it is safe.
Since Xmatrix (where X stands for noting, p, b, B, v or V) is array in disguise, the same applies. Also cases falls in this class.
It's very different with align, alignat, xalignat, flalign and gather (or *-forms thereof), where a trailing \ would produce a new empty row (with the equation number in the case of no *), so it must be avoided.
As a habit, I tend to avoid the trailing \ in Xmatrix, just for symmetry with the alignment environments mentioned above.
answered 6 hours ago
egreg
696k8518483111
add a comment |
up vote
7
down vote
accepted
There is no difference at all for bmatrix. There is for align.
Any array or tabular allows a trailing \; it is obviously mandatory if hline is needed at the bottom, but otherwise omitting it is safe.
Since Xmatrix (where X stands for noting, p, b, B, v or V) is array in disguise, the same applies. Also cases falls in this class.
It's very different with align, alignat, xalignat, flalign and gather (or *-forms thereof), where a trailing \ would produce a new empty row (with the equation number in the case of no *), so it must be avoided.
As a habit, I tend to avoid the trailing \ in Xmatrix, just for symmetry with the alignment environments mentioned above.
answered 6 hours ago
egreg
696k8518483111
add a comment |
up vote
7
down vote
accepted
up vote
7
down vote
accepted
There is no difference at all for bmatrix. There is for align.
Any array or tabular allows a trailing \; it is obviously mandatory if hline is needed at the bottom, but otherwise omitting it is safe.
Since Xmatrix (where X stands for noting, p, b, B, v or V) is array in disguise, the same applies. Also cases falls in this class.
It's very different with align, alignat, xalignat, flalign and gather (or *-forms thereof), where a trailing \ would produce a new empty row (with the equation number in the case of no *), so it must be avoided.
As a habit, I tend to avoid the trailing \ in Xmatrix, just for symmetry with the alignment environments mentioned above.
answered 6 hours ago
egreg
696k8518483111
There is no difference at all for bmatrix. There is for align.
Any array or tabular allows a trailing \; it is obviously mandatory if hline is needed at the bottom, but otherwise omitting it is safe.
Since Xmatrix (where X stands for noting, p, b, B, v or V) is array in disguise, the same applies. Also cases falls in this class.
It's very different with align, alignat, xalignat, flalign and gather (or *-forms thereof), where a trailing \ would produce a new empty row (with the equation number in the case of no *), so it must be avoided.
As a habit, I tend to avoid the trailing \ in Xmatrix, just for symmetry with the alignment environments mentioned above.
answered 6 hours ago
egreg
696k8518483111
answered 6 hours ago
egreg
696k8518483111
answered 6 hours ago
egreg
696k8518483111
answered 6 hours ago
egreg
696k8518483111
696k8518483111
add a comment |
add a comment |
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If it produces the same output, I guess there's no difference.
– Tvde1
7 hours ago
I think there's no rule for this. I think it depends on the implementation of the environment. With
align, for instance, you get an undesired line if you add the\at the end.– Phelype Oleinik
7 hours ago