Tagged Questions
9
votes
4answers
149 views
Curved arrow describing a step in a mathematical derivation
Is it possible to achieve something like this in LaTeX?
I want a curved arrrow pointing from 1st line to the other line and is coupled with an equation number which indicates the equation used. I ...
8
votes
1answer
416 views
Is there a left-handed equivalent of \implies?
I’m aware of and use the \implies and \iff commands to denote right-handed implication and if and only if (so A=>B and A<=>B). I’ve been looking for a similar command for left-handed implication ...
6
votes
1answer
157 views
Understanding ext@arrows
I don't quite understand how \ext@arrow of amsmath is working. When I look at the code, its functionality seems straight forward to me at the first glance.
\def\ext@arrow#1#2#3#4#5#6#7{%
...
2
votes
1answer
483 views
Commutative diagram with parallel arrows in opposite direction
I have a diagram of the following form, written with the package amscd:
\begin{align*}
\begin{CD}
W @>\phi>> X \\
@V{a}V{b}V @V{c}V{d}V \\
Y @>\phi>> Z \\
\end{CD}
...
8
votes
4answers
431 views
Better transitive closure of labelled arrow
I think the answer will be easy, but I haven't found it yet:
I use labelled arrows like \xrightarrow\tau a lot.
Sometimes, I need the transitive closure of such relations, which I write
...
