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Finding neighborhood preserving translations on graphs

Installation

ocamlopt str.cmxa main.ml -o main.native

Or, if you prefer slow version

ocamlc str.cma main.ml -o main.bytecode

Usage

This is an OCaml implementation of the methodology described in this paper.

Input is read on stdin. Format is the following: vertices are labelled from 0 to n-1. First line contains n, then each consecutive line contains the list of neighbors of the next vertex (starting from vertex 0) separated by blank spaces.

For example for a ring graph:

8
1 7
0 2
1 3
2 4
3 5
4 6
5 7
6 0

Output contains the list of maximal translations found on this graph. Complexity is clearly exponential so do not expect results on large graphs.

Example output:

Extracting maximal translation with loss 0
1 2 3 4 5 6 7 0 
Extracting maximal translation with loss 0
7 0 1 2 3 4 5 6

Output is read as image_of_vertex0 image_of_vertex1 ... image_of_vertexn-1. A -1 means the vertex has no image.