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### how to use latex draw graphs, just like this? [duplicate]

Recently, I am using LaTex to draw graphs. However, I don't know how to do it. My graphs just like: How can I do it?
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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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### I want to draw a nice connecting homomorphism arrow

\begin{tikzpicture}[scale=1.5] \node (A) at (0,0) {$0$}; \node (B) at (1,0) {$H^0(G,P)$}; \node (C) at (2,0) {$H^0(G,M)$}; \node (D) at (3,0) {$H^0(G,N)$}; \node (E) at (1,-1) {$H^1(G,P)$}; \node (F) ...
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### 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 ...
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### Looking for TikZ flourishes and vignettes

I'm a sucker for the fancy section markers (commonly called vignettes or ornaments). For an example, look at the beautiful symbol beneath the {TeX} logo on this site, or this flourish below However, ...
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### Align edges with anchor other than center

It seems that, when drawing an edge between two nodes, TikZ defaults to aligning the edge with the 'center' anchors of the two nodes. More precisely, the edge points from the center of one node to the ...
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### 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:
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### Why do I have so much free space on the left-hand side of my tikz diagram?

Inspired by How do you draw the "snake" arrow for the connecting homomorphism in the snake lemma? I created my own snake like diagram (see below). The entries are rather large and the ...
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### Arrows for morphisms of exact sequences

I'm trying to figure out a good way to use LaTeX to draw the following diagram (snapshot image from a document). The closest I could come to this is using the following code: \begin{align} \begin{...
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### Tikz-cd and snake lemma: “loseness” and centered figures

I have to draw a snake lemma, as here: snake lemma. The code is \documentclass{article} \usepackage{tikz-cd} \usepackage{amsmath} \DeclareMathOperator{\Tor}{Tor} \begin{document} ...
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### 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'...
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### 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, ...
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### How can I do this diagram with tikz?

How can I do this diagram with tikz?