Tagged Questions
6
votes
3answers
2k views
Commutative diagram with rounded arrows
I want to draw a diagram which has some arrows between to points A and B. First arrow goes straight from A to B and above it should be a $\Psi$. Second arrow goes in a round way from A to B and above ...
2
votes
3answers
921 views
Adding arrows to each term of an equation
\documentclass{beamer}
\usepackage[all]{xy}
\begin{document}
\section{Introduction}
\xymatrix{
&*+{\sum_{i=n}^m {i^2}} &*+{+}&*+{p} \\
& {\bullet} & D \ar[ul] && f \ar[ul]
...
9
votes
3answers
1k views
Pushouts and pullbacks
How do I typeset that little symbol which indicates that a commutative square is a pushout or pullback square? I usually draw my diagrams in XY-pic, so I'd be most interested in how to do it there.
...
