Question

In a primitive symmetric association scheme, why does $E_j$ occur in some power of $E_i$ for each $i,j$?

score 91 · Answer 1 · 2026-03-27 21:58:30

91

Views

In a primitive symmetric association scheme, why does $E_j$ occur in some power of $E_i$ for each $i,j$?

Published on 27 Mar 2026 - 21:58

score 67 · Answer 2 · 2021-02-02 16:28:01

67

Views

Uniqueness of the solution of a linear system of equations

Published on 02 Feb 2021 - 16:28

score 148 · Answer 3 · 2021-02-02 17:24:44

148

Views

Proving that $|\operatorname{Aut}(C_n)|=2n$.

Published on 02 Feb 2021 - 17:24

score 59 · Answer 4 · 2021-02-02 18:27:49

59

Views

Conditions for uniqueness of the solution of a linear system of equations

Published on 02 Feb 2021 - 18:27

score 688 · Answer 5 · 2021-02-08 09:16:46

688

Views

What is the automorphism group of a complete bipartite graph isomorphic to?

Published on 08 Feb 2021 - 9:16

score 80 · Answer 6 · 2021-03-02 18:58:44

80

Views

Norm on graphs & functions with same nodes

Published on 02 Mar 2021 - 18:58

score 44 · Answer 7 · 2021-03-04 09:32:58

44

Views

Show that if $G$ is 8-edge-connected ; if ${E}'$ is a sub set of $E$ edges of $G$ and $|{E}'|=8$ then $w(G-{E}')\leq 2$

Published on 04 Mar 2021 - 9:32

score 341 · Answer 8 · 2021-04-08 14:42:26

341

Views

Interpretation of the Laplacian operator in graphs

Published on 08 Apr 2021 - 14:42

score 128 · Answer 9 · 2026-03-27 00:56:17

128

Views

Algebraic Graph Theory - Bounding Spectral Radius

Published on 27 Mar 2026 - 0:56

score 107 · Answer 10 · 2026-03-29 12:51:09

107

Views

What is the zeta function for a finite graph?

Published on 29 Mar 2026 - 12:51

score 164 · Answer 11 · 2021-04-23 00:43:01

164

Views

Is a cycle composed of two primitive cycles from different equivalent classes also primitive?

Published on 23 Apr 2021 - 0:43

score 73 · Answer 12 · 2021-04-23 15:00:33

73

Views

How is this graph decomposable?

Published on 23 Apr 2021 - 15:00

score 330 · Answer 13 · 2021-05-10 11:37:58

330

Views

Prove that any 3-regular graph with diameter 2 and order 10 is isomorphic to Petersen graph.

Published on 10 May 2021 - 11:37

score 266 · Answer 14 · 2021-05-12 05:54:17

266

Views

Singular values of incidence matrix of a graph

Published on 12 May 2021 - 5:54

score 42 · Answer 15 · 2021-06-18 18:07:57

42

Views

If a product of expander Cayley graphs is connected, is it automatically an expander?

Published on 18 Jun 2021 - 18:07

List Question

In a primitive symmetric association scheme, why does $E_j$ occur in some power of $E_i$ for each $i,j$?

Uniqueness of the solution of a linear system of equations

Proving that $|\operatorname{Aut}(C_n)|=2n$.

Conditions for uniqueness of the solution of a linear system of equations

What is the automorphism group of a complete bipartite graph isomorphic to?

Norm on graphs & functions with same nodes

Show that if $G$ is 8-edge-connected ; if ${E}'$ is a sub set of $E$ edges of $G$ and $|{E}'|=8$ then $w(G-{E}')\leq 2$

Interpretation of the Laplacian operator in graphs

Algebraic Graph Theory - Bounding Spectral Radius

What is the zeta function for a finite graph?

Is a cycle composed of two primitive cycles from different equivalent classes also primitive?

How is this graph decomposable?

Prove that any 3-regular graph with diameter 2 and order 10 is isomorphic to Petersen graph.

Singular values of incidence matrix of a graph

If a product of expander Cayley graphs is connected, is it automatically an expander?

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