656 questions

175

views

no

answers

no

votes

2025-09-07 22:13:19 +0200 Max Alekseyev

Eigenvalues changing at only one position

Test if a graph is vertex pancyclic

• graph
• graphtheory

Finding a spanning subgraph that satisfies a given condition

• graphtheory

Groebner basis computation extremely slow

• grobner-basis
• parallelization
• computation_time

Action of symmetric group

• graphs
• symmetric_group
• group_action
• combinatorics

Restricted matchings in simplicial complexes or graphs

• combinatorics
• graphs

Generating simplicial trees (equivalently, totally balanced hypergraphs) on $n$ vertices

• combinnatoric
• graph-theory
• hypergraphs
• algorithm
• SimplicialComplex

knot theory alternatives to sage?

• knot
• theory
• skein
• plot

276

views

2

answers

no

votes

2025-05-14 07:44:43 +0200 FrédéricC

Output of RootedTrees()

• OrderedTree
• combinatorics
• digraph
• output
• graph-algorithm

82

views

1

answer

1

vote

2025-04-15 19:25:29 +0200 John Palmieri

Having trouble latex the crystal graph using sage, KeyError: 'node_1'?

• graphlatex

How to plot points of a finite plane?

• graphics
• Lines
• plot
• finite
• plane

Consider the class of simple connected bicyclic graphs on $10$ vertices. Let $A$ be the adjacency matrix of any such graph.

L-infinity norm in multivariable function

Inquiry About GSOC 2025: SageMath Project on Paths and Cycles Enumeration Methods

308

views

1

answer

1

vote

2025-03-06 22:21:16 +0200 Max Alekseyev

How to find the graphs from the following collection whose determinant is maximum?

plotting graphs, vertices on some graphs are very small

How to plot this

Plots not showing up for Sage+Python

• 2Dplot
• jupyter-notebook
• ipynb
• vscode

automorphism of a graph

• automorphism
• graphs

306

views

1

answer

1

vote

2024-10-25 21:29:46 +0200 FrédéricC

A limit trivial in polar coordinates cannot be computed in Cartesian coordinates. Why ?

• limit

How to specify dashed edges in SageMath?

• graphtheory

Find a perfect bisimplicial ordering in a faster algorithm

• graph
• graph-theory

How to make edges Curve with Plot

`legend_label` for 2d scatter plot

• 2Dplot

229

views

no

answers

no

votes

2024-08-30 13:09:19 +0200 rburing

how to get the sagemath programs related to graphs with nodes and edges

Memory leak in is_planar

• memory-leak
• is_planar
• graphs

Is there a way to get the Tait graph from a knot diagram?

• knots
• ask-sage
• snappy
• knot-theory
• laplacian

Does Sage have a function to determine vertex cuts?

• graph-theory

Twin reduction in Graph

• graph-theory

205

views

no

answers

no

votes

2024-07-14 13:47:50 +0200 rewi

Does there exists any simple connected graph $G$ of order $n$, such that whenever $\dfrac{\lambda}{k}$ is an eigenvalue of the adjacency matrix of $G$

• graph-theory