# Tagged Questions

{xy-pic} is a package for typesetting graphs and {commutative-diagrams} using the principle of "logical composition of visual components."

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### How do you draw the “snake” arrow for the connecting homomorphism in the snake lemma?

How does one draw the "snake" arrow for the connecting homomorphism when using the snake lemma? I'd also be interested in drawing similar arrows act as "carriage returns" when considering a long ...
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### Commutative Diagrams

Can anyone help me in giving commands for commutative diagrams in LaTeX ? It doesn't seem to appear properly in the LaTeX guides that I have. A command for a simple triangular diagram with arrows ...
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### How to make nice braids diagrams

This question led to a new package: braids — Blog: The Braids Package I search to draw braids diagram, if possible in xy-pic. I already know how to do that with the knot module and some low-level ...
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### Bending snakes with xy-pic

This is a follow-up to this question: How do you draw the "snake" arrow for the connecting homomorphism in the snake lemma? I'm trying to emulate this snake diagram Aluffi does in his book "...
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### Natural transformation arrow

I'm trying to do the following with xymatrix: This is a diagram I drew sometime ago... But now I don't have the source and I can't remember how I did it, nor can I find an easy, simple way to do it....
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Is there a way to color certain (but not all) arrows using \xymatrix? I wish the following ignorant attempt would work!! \usepackage{xypic,color} \begin{document} $\xymatrix { X\ar[r]\color{red}{\... 3answers 4k 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 ... 2answers 1k views ### Showing arrows crossing over or under other arrows in xy-pic without knots I have an xymatrix in which two arrows cross each other, say \xymatrix{ \ar[dr] & \\ \ar[ur] & } and I would like one arrow to cross over the other. I also want to to be able to do this ... 3answers 502 views ### Gaps between arrows and labels I have a question about my diagram. How can I increase the gap between the arrows and the labels? I would like to have more space between the left arrow and the label (2). Thanks for any suggestions. ... 1answer 722 views ### How can I draw this commutative diagram for function composition? I am working on a project, and need to add a diagram that displays a commutative diagram illustrating basic function composition similar to what is on page 17 in the image attached. I would like to ... 1answer 332 views ### Cannot draw diagram I'm trying to draw a diagram but I get the following error message: ! Xy-pic error: in entry "1,1": No [ld] (is "2,0") from here. The code is: \xymatrix{A\times B \ar[ld]_p \ar[rd]_q\\ &... 1answer 214 views ### How do I discover the shorthands defined by babel in my language? The reason I want to do it is that I want to set brazilian language in babel and I want to use xy-pic package, but I have to use it inside an environment in which the shorthands are off. 2answers 217 views ### Dotted and bent xy matrix arrow has non-dotted turns I have this diagram I'm doing with xypic, and I want to make bent arrows going from the top to the bottom of the diagram. So I re-learn the syntax for bending around entries. THen I decide I want ... 1answer 518 views ### Loop arrow in xypic I am trying to get a loop arrow in an xypic diagram, and I just can't. For now, I have the following: \[\xymatrix{ p^{-1}(U_{\alpha})\ar[rr]^-{\tau_{\alpha}} & & U_{\alpha}\times\mathbb R^k\... 2answers 146 views ### Extra whitespace at top of xymatrix I'm making some slides where I want to show permutations with little diagrams of dots and arrows. Here is my attempt to depict the permutation 12345 --> 31245: \documentclass{article} \usepackage[... 1answer 414 views ### \xymatrix undefined I am trying to use xy package to draw some diagrams. So I use the command \usepackage{xy} and I type a sample as follows: \xymatrix{ A &*+[F]{\sum_{i=n}^m {i^2}} \\ & {\bullet} & D \... 3answers 3k 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. ... 3answers 704 views ### Which package should I use for doing a connecting homomorphism diagram like this in latex which package should I use for doing a diagram like this in latex: 3answers 7k views ### Is there a way to resize a figure created with xymatrix? I've drawn some figures using xymatrix, but they're much larger than I'd like them to be. Is there a way to resize them? I'd be happy to cut them down to a fixed percentage of the original or to a ... 1answer 401 views ### TeX figure to .png Let me begin with a confession: when someone says command line'' I nearly pee because I get so scared. I know that means I'm asking my question to the wrong community, and yes, I'm seeing someone ... 2answers 488 views ### Multiple holes in arrows in xypic I am trying to make a diagram where two arrows will be crossing one arrow. I have the current code for putting in one hole: \Omega \ar[r]|(.35)\hole^-{d} \ar[d]^-{e_*} which seems to work just ... 1answer 173 views ### How to draw this diagram Please help me to draw the following diagram: \begin{displaymath} \xymatrix{ H\ar[r]&H .1={}_HI_Q\supset 1.Q&Q\ar[l]_\epsilon^{\cong} \\ &R\ar[u]\ar[r]&R\ar[u] } \end{displaymath} 1answer 126 views ### Custom commands for xymatrix paths I would like to define a custom command to replace \ar@{->}r[d][l][llld]_-{\delta}[d][lld] in this bit of code: \[\xymatrix{ \cdots\ar@{->}[r] & H_n(X)\ar@{->}[r] & H_n(Y)\ar@{-&... 2answers 871 views ### Better arrowheads in commutative diagrams The Fourier package gives a different look for the arrowheads, which looks nice to me. I also want to use this arrowhead in the commutative diagrams. I have tried Taylor's diagrams package, xy-matrix, ... 2answers 747 views ### xypic: How to typeset the dashed line in this diagram? I use xypics for diagrams, but I don't know how to put the dashed line in the diagram below. Search didn't find much. Can anybody here help? 1answer 59 views ### What is “\SelectTips{a}{b}” (and how to increase the head of an arrow's head?) At is \SelectTips{a}{b} and is the meaning of {a} and {b}? I know that the first one changing the type of the arrow, but what is the second one? The value there can be only 10,11,12.... And if I can ... 1answer 320 views ### Change the orientation of Arrow of xtwocell in the 2cell option for xy I'm trying to make a diagram similar to this (from wikipedia) Except that I want to the double arrow \eta two be pointing from node B toward the middle of arrow X (it is, after all, a natural ... 0answers 67 views ### Composition in a multicategory I am trying to figure out how to draw composition in a multicategory using same depiction used in Leinster's book "Higher Operads, Higher Categories". Here is what I am trying to draw: I did ... 1answer 3k views ### Commutative diagram with curved arrows, colour, and changing the style of arrows I am using xy matrix and I would to curve an arrow over other arrows in a diagram, at the same time as setting some of these curved arrows to equal and changing their colour. This is what I have so ... 1answer 784 views ### How do I make the arrow -->— using xymatrix? I do not know any TikZ so I cannot use this post, which otherwise is precisely what I am looking for. So how do I make such a square? The best I could come up with was \ar@{-}[r]^{\delta}|-{>} ... 1answer 288 views ### Using xy-pic, how do you label an arrow with a curly brace that spans the length of the arrow, and can be offset arbitrary distances? I'm trying to figure out how to label the arrows with curly braces that span the length of the arrow, and to make it all very pretty. More specifically, I'm trying to make \documentclass[10pt]{... 1answer 284 views ### dotted or colored arc in \xymatrix Does not arrows style or color option apply an arc in \xymatrix? Please let me know the way. \documentclass{article} \usepackage[arrow, matrix]{xy} \begin{document} \[ \xymatrix{ A \ar@{.&... 2answers 767 views ### Problem bending arrows in xypic I'm having an annoying problem bending an arrow with xypic. I read the part 2.8 of the manual (http://www-bcf.usc.edu/~cautis/tools/xypic.pdf‎) about bending arrows, but could not understand it. Here'... 1answer 141 views ### Bad interaction between babel and xypic? I'm writing an elaborate in Italian, and I'm using XY-pic to draw some diagrams. Unfortunately it seems that babel is interacting with XY-pic, making it impossible to group elements. Here is a MWE: \... 2answers 211 views ### How to position hole in an arrow in xypic trying to draw a 3D commutative diagram here and getting really stuck trying to get the hole in one of the arrows in the right place, you should see which one I mean as there is only one crossover. ... 2answers 1k views ### ways to indicate commutativity and non-commutativity of a diagram when using xymatrix I used the following code, but \circlearrowleft looks no good in this diagram. I would like to know if there is a better way to indicate the commutativity. Also, is there any way to indicate non-... 3answers 117 views ### Problems with special arrow shaft in xypic I'm trying to draw a diagram my teacher drew on the blackboard to summarize divisibility relationships and I just can't get it right. Here is my best attempt: \documentclass[a4paper]{report} \... 1answer 325 views ### tikz-cd equivalent to the xy-pic command \ar@{-} How do I make the diagram X - Y -> Z with tikz-cd? With xy-pic, I would enter \xymatrix{ X \ar@{-}[r] & Y \ar[r] & Z } I tried \begin{tikzcd} X \ar[no head]{r} & Y \ar{r} &... 1answer 292 views ### Issue with arXiv LaTeX - xypic diagrams rendering badly I’m having an odd issue with the arXiv’s LaTeX processing: xypic diagrams that look fine when processed on my own system are rendering badly when processed by the arXiv. My question is: Is this ... 1answer 38 views ### standalone package, with its subpreambles option, gives error if xy package is loaded in a standalone input file The standalone package, with its subpreambles option, gives error if the xy package is loaded in one of the standalone input files. This is shown by the following M(n)WE: \begin{filecontents}{testxy} ... 1answer 59 views ### misdirected xymatrix arrow heads with certain fonts I'd like to use \mathsf{C} rather than \mathcal{C} for categories. However, when I use the former in the first displayed equation, the top arrowhead (the arrow labelled L) points northwest, rather ... 2answers 523 views ### xypic not showing arrowheads I have (supposedly) successfully installed xypic and am attempting to draw some diagrams. Everything is compiling just fine, but no matter what I do I cannot get the heads of the arrows to appear. All ... 3answers 336 views ### a commutative diagram compatible with group actions I'm trying to draw the following commutative diagram using xymatrix: \documentclass{article} \usepackage[all]{xy} \begin{document} \xymatrix{A \ar[rr] & & B \\ & C \ar[ul] \ar[... 2answers 128 views ### Bending arrow in XY-Pic diagram In the diagram with bending arrow given by the LaTeX file below, the arrow has a misdirected head. How can I correct it? \documentclass[a4paper,11pt]{amsart} \usepackage[all]{xy} \begin{document} \[ ... 1answer 154 views ### Errors when trying to draw a commutative diagram using an xymatrix Why is the following code not compiling? \[ \xymatrix{ A \ar[rd]^{g \circ f} \ar[r]^f & B \ar[d]^g\\ C}$ I'm trying to get a commutative diagram with 3 objects (A, B and C) ...
Let us consider the following example: \documentclass{book} \usepackage[all]{xy} \begin{document} $\xymatrix{A\ar[rr] && B}$ \end{document} This produces but I want the following ...