>Surely an isomorphism is a mapping between two mathematical objects which maps
>all the elements of one object to all the elements of the other object in such
>a manner that there is a one-to-one correspondence between elements. The two
>objects in question need not be algebraic groups. Indeed, contrary to the
>views of many theoretical chemists and physicists I have met, mathematicians
do
>study other objects besides groups! :-)
Hmmm... quite a few people already do it with graphs (graph isomorphism,
oddly enough...) and it's not necessarily *all* of the objects (subgraph
isomorphism), and some areas (probabilistic isomorphism algorithms) don't
always assume an exact mapping.
Apologies if this is slightly off-area.
Sj.
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Sara-Jayne Farmer
[EMAIL PROTECTED] http://www.cs.york.ac.uk/~sara/
Department of Computer Science, University of York, York YO10 5DD, UK
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