7. A method according to claim 1 wherein said matching step b comprises the step of: building an isomorphism between two subsets of 0-cells by several successive runs of different filtering procedures which reject certain potential matches if they are recognized as invalid.
7. A method according to claim 1 wherein said matching step b comprises the step of: building an isomorphism between two subsets of 0-cells by several successive runs of different filtering procedures which reject certain potential matches if they are recognized as invalid. 18. A method according to claim 7 comprising the steps of: a. creating 0-dim and 1-dim factor-graphs for each of maps A and B; b. marking the factor-graphs identically; and c. storing the factor-graphs in corresponding files of the matched chains.