# Questions tagged [graph-isomorphism]

The tag has no usage guidance.

71 questions
Filter by
Sorted by
Tagged with
23 views

### Subgraph isomorphism index/precomputation

I'm currently working on problem in which a set of graphs $T=\{t_1,\dots,t_n\}$ is given and fixed. Given a graph $m$ I want to check which of the $t_i$ are subgraphs of it, as quick as possible. Is ...
1k views

### How to define a similarity between two graphs?

Let's say we have a set of vertices $V$, and two (undirected) graphs over the same set $V$, but not necessarily the same set of edges $G_1 = (V, E_1)$, $G_2 = (V, E_2)$. $\newcommand\mG{\mathbb G}$(...
50 views

495 views

### NSPACE for checking if two graphs are isomorphic

I was studying nondeterministic Turing Machines and came across the following question: Describe a nondeterministic Turing Machine (NTM) that only accepts two graphs (G1 and G2) if they are ...
1k views

### On graph isomorphism for weighted graphs

Is there a $O(n^2)$ algorithm to resolve isomorphism between two weighted $n$-vertex graphs? This is a much easier problem than graph isomorphism. Basically take an real edge weight set \$\{w_1,\dots,...