Licheng Zhang

Export graphs in a single PDF file

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Hello, I see that when converting all the images to PDF, they are all separate. In fact, in academic writing, sometimes we need to put them together (though usually not...

Filter graphs with the same spectrum

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Cospectral graphs, also called isospectral graphs, are graphs that share the same graph spectrum. Input a set of graphs, can GraphFilter check which graphs are the same spectrum? If the...

Can such a search pattern (based on the neighbourhood) be designed?

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I want to filter graphs that satisfy that $|N(x)\cup N(y)|\ge \frac{2(n-1)}{3}$ for any $xy\notin E(G)$? Note that $N(v)$ refers to the neighborhood of a vertex $v$. First, I did not...

**What is the feature or improvement you would like to see?** Implement a polynomial-time algorithm for recognizing perfect graphs. **Use cases for the feature** As I mentioned in https://github.com/szhorvat/IGraphM/issues/133, I...

Find criteria for determining that a graph is not a perfect graph

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Crossed post in https://mathematica.stackexchange.com/questions/tagged/graphs-and-networks **What is the feature or improvement you would like to see?** Find criteria for determining that a graph is not a perfect graph A graph is...

Request for Built-in Function: Tutte Embedding of 3-Connected Planar Graphs

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### Problem Description The Tutte embedding is a graph-drawing technique to position vertices of a graph so that the outer face is a convex polygon and each interior vertex is...

When I run pdflatex, we get a pdf. But there is too much blank space.  When I only want to insert the PDF, I have to crop it