Chris Godsil's user avatar
Chris Godsil's user avatar
Chris Godsil's user avatar
Chris Godsil
  • Member for 14 years, 5 months
  • Last seen more than a week ago
5 votes
Accepted

Do right-profiles determine graphs up to isomorphism?

5 votes

Where was it first stated that there are no 4-transitive finite groups other than symmetric, alternating and Mathieu groups?

5 votes

Which directed graphs have a normal adjacency matrix?

5 votes
Accepted

Characteristic polynomial of hypercube graph

5 votes
Accepted

"Nice" eigenvectors for (square of) adjacency matrix of a bipartite graph?

5 votes

Repeated Second Eigenvalue of the Adjacency Matrix of a Graph

5 votes
Accepted

What are the key applications of the MacWilliams identities in coding theory?

5 votes

Ihara zeta and chromatic number of graphs

5 votes
Accepted

Operation on Isospectral graphs

5 votes

Citation of a paper with a proof you would like to improve

5 votes

Why is edge-coloring less interesting than vertex-coloring?

5 votes

Why do so many textbooks have so much technical detail and so little enlightenment?

5 votes
Accepted

Statement of Lagrange's theorem on determinants(elementary question).

5 votes

Are vertex and edge-transitive graphs determined by their spectrum?

5 votes
Accepted

Association scheme on injective functions

5 votes

association schemes, infinite schemes, semi-schemes, quasi-schemes

4 votes
Accepted

Graphs where every two vertices have odd number of mutual neighbours

4 votes
Accepted

Double orthogonal complement of a finite module

4 votes
Accepted

Lovasz theta function integrality

4 votes

Full-rank linearly independent matrices

4 votes

The number of non-isomorphic strongly regular graphs on n vertices

4 votes

On duality on finite projective planes

4 votes
Accepted

The smallest eigenvalue from an equitable partitions

4 votes
Accepted

Is there a closed form for the characteristic polynomial of the graph cycle (of n edges and n summits) ?

4 votes
Accepted

how to cover set of k-combinations of M with subsets of M

4 votes
Accepted

Simple Laplacian versus simple adjacency matrix eigenvalues

4 votes

Characteristic polynomials of trees and E8

4 votes
Accepted

Paley graphs over $p^{2}$ vertices

4 votes

Eigenvalues of principal minors Vs. eigenvalues of the matrix

4 votes
Accepted

Strongly rigid connected $k$-regular graphs

1 2 3
4
5
7