1
vote
1answer
64 views

The meaning of $\rightsquigarrow$? [closed]

Perhaps this is not the good place to ask this question. In order to write a scientific paper, I would like to use the symbol $\rightsquigarrow$ (works also with $\leadsto$ which has a clearer ...
2
votes
1answer
82 views

To have a question mark over an arrow [duplicate]

I want to have a question mark over the arrow "\to". I cannot use "\limits^{?}" command because "\to" is not a mathematical operator. How can you have a question mark over the arrow?
13
votes
2answers
158 views

Long Dashed Right Arrow

Is there a \dashrightarrow equivalent of: \xrightarrow{\hspace*{4mm}} or \longrightarrow or a similar way to fudge it?
9
votes
4answers
249 views

Highlighting equation with arrow

I want to create an equation with highlighting as shown bellow. But using following code: \documentclass[10pt,a4paper]{article} \usepackage[utf8]{inputenc} \usepackage{amsmath} ...
0
votes
0answers
88 views

Better extensible arrows

Using amsmath and extarrows packages, we have many extensible arrows. But these arrows look ugly, since some parts in an arrow are boldfaced. Are there any better-looking extensible arrows?
8
votes
2answers
177 views

Underarrow with smaller depth, shorter minimum length, and smaller arrow head?

I am using underarrows from amsmath to decorate messages with their direction, as in $\underleftarrow{\mathsf{msg}}$ () and $\underrightarrow{\mathsf{msg}}$ (). I am looking for a better underarrow, ...
9
votes
4answers
328 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 ...
11
votes
1answer
2k 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
230 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
963 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
683 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 ...