1009 questions

177

views

no

answers

no

votes

0 years ago 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

vertex labels exceed space and intersect with edges

• 2Dplot
• Elliptic-curves

Not interactive plot

• 2Dplot

name 'Graph' is not defined

• graphtheory

527

views

1

answer

no

votes

0 years ago Max Alekseyev

Connected non-bipartite graphs with a unique perfect matching having highest value of determinant

sage.all is not available; this is a limited REPL. [closed]

• install
• Archlinux

Incorrect plot

• 2Dplot

208

views

1

answer

no

votes

0 years ago John Palmieri

Functions source code

• graph-theory
• source-code
• is_isomorphic
• subgraph

Generate all connected graphs of order 12 with matching number of 4

• graphtheory

How to determine there is a k-path between two vertices

• graphtheory

178

views

1

answer

no

votes

0 years ago rburing

Reference for cospectral_graphs function?

• cospectral

How to store images of graphs in a PDF?

• graphtheory
• pdf

270

views

1

answer

no

votes

1 year ago rburing

How to see the source code of the function distance_graph

• graph-theory
• source

231

views

1

answer

no

votes

1 year ago Max Alekseyev

Integer valued eigenvalues

229

views

1

answer

1

vote

1 year ago rburing

How to add edges while keeping the original graph unchanged

• graphtheory

How to determine whether a graph has l cycles of length k exactly?

• graph
• graph-theory

Calculate the toughness of a graph

• graphtheory

341

views

1

answer

4

votes

1 year ago John Palmieri

Implementing a new class on Sage

• Sage-development
• development

367

views

2

answers

2

votes

1 year ago Max Alekseyev

How define a graph where edges are defined using a condition?

• graphtheory

Generating prime graphs

• is_prime

how display labels edges and color with dictionary? ​

• graph
• edge_labels
• edge_colors

show() for equations is not working

• show

269

views

1

answer

no

votes

1 year ago Max Alekseyev

How to determine if two colorings of a graph are the same?

• graphtheory

62

views

no

answers

no

votes

1 year ago John Palmieri

Generalized quadrangles of order (5,5^2)

• non-isomorphic
• generalized
• quadrangles

134

views

1

answer

no

votes

1 year ago Max Alekseyev

Implementation of BEST theorem

• Eulerian_Circuits
• best
• enumerating
• directed-graphs

885

views

1

answer

no

votes

1 year ago rburing

"The kernel appears to have died.It will restart automatically." No graphs plotting

• jupyter-kernel
• graphics-library

all_simple_paths generates AttributeError for graphs

• paths
• graphtheory
• possible-bug

plotting origin location

• plot
• origin

466

views

1

answer

no

votes

1 year ago rburing

How to save a list of graphs into a graph6 format file?

• graphtheory

244

views

1

answer

no

votes

1 year ago FrédéricC

listing desired polynomials of given degree

• finite-fields
• irreducibility
• Abstract