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Newest 'graphs-and-networks' Questions - Mathematica Stack Exchange
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Learn more about TeamsQuestions tagged [graphs-and-networks]
Questions about handling graphs in Mathematica, graph theory, graph visualization, GraphPlot, the built-in Graph type and the Combinatorica` package.
2,246 questions
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4
votes
2
answers
218
views
Enlarged Graph vertices are covering up edge arrows
My goal is to capture the results of brainstorming session in a graph where, for the high-level process, the vertices look like text boxes and are connected by directed edges.
I succeeded in the first ...
2
votes
3
answers
269
views
Why does importing a .dot graph file cause \l and \r to become \n?
When I import a DOT file (or a string in that format) with labels containing the exact characters \\l or \\r, they are displayed ...
2
votes
0
answers
95
views
Results of Colin de Verdière's graph invariant calculations do not correspond to the nature of the graph under study
I decided to test Colin de Verdière's graph invariant method and use it to estimate the planarity of a graph.
The materials I used:
https://en.wikipedia.org/wiki/Colin_de_Verdi%C3%A8re_graph_invariant
...
2
votes
2
answers
97
views
How can I efficiently find all cutsets of a graph based on the definition of cutset?
I want to find all cutsets of a graph based on the following definition:
A cutset is a set of edges of a connected graph G such that the removal of these edges from G reduces the rank of G by one, ...
1
vote
0
answers
66
views
Formulae of different topological indices [closed]
A topological index, also known as a connectivity index, is a type of a molecular descriptor that is calculated based on the molecular graph of a chemical compound
How to refine below code (...
1
vote
0
answers
56
views
Efficient calculation of Hosoya Index
The Hosoya Index is the number of independent edge sets (i.e., matchings) in a graph.
I have implemented it in Mathematica (based on the source code provided in ...
4
votes
1
answer
210
views
Efficient calculation of treewidth
The treewidth of an undirected graph is a very important concept in graph theory.
I have ported the python code from a related Code Golf question to Mathematica, and it has passed the test cases.
...
1
vote
1
answer
106
views
Rectangle counting in large bipartite graphs
For a bipartite graph, the local clustering coefficient of a node $v$ is the number of rectangles containing $v$ as a fraction of (something like, depending on the definition) the total number of ...
1
vote
0
answers
51
views
How to accelerat the Mathematica code calculating cover time of one graph?
The cover time of a graph is the expected time it takes a simple random walk on the graph to visit every node.
Related MSE post.
How to accelerat the Mathematica code calculating cover time of ...
2
votes
1
answer
75
views
Generate only certain number of graphs because of limited RAM
I am using the code provided in the answer for this other question. It is shown below:
...
0
votes
0
answers
69
views
ConvexHullMesh::affind error message in Mathematica V14.2 but not in V12
Using Mathematica 14.2 I am trying to run the following built in function: CommunityGraphPlot
I'm getting the following error message: ConvexHullMesh::affind
When trying to run examples provided in ...
3
votes
1
answer
109
views
Important clarification about PlanarGraphQ
By definition, a planar graph is a graph that can be represented on a plane without intersecting edges.
...
- 2,665
6
votes
2
answers
344
views
Semicolon indentation. Is the bug in graph functions or in front end?
Bug introduced in 13.0 or earlier and persisting through 14.2.1 or later
The following produces correct outputs.
...
2
votes
2
answers
209
views
How can we choose the numbers as shown in the figure to obtain the smallest possible final sum?
I have a graph
I have
When I go A-> B -> C->D->E->A I get the sum 23,
and
How can I find the numbers like the graph. I tried
...
5
votes
1
answer
205
views
Turning the solution from Reduce to a graph
I am trying to make a graph from an arbitrary solution from reduce so that it looks prettier and is more readable.
My question is very similar to the question How can I make the output of Reduce more ...
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