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Talk:Invariant

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I removed this:

In mathematics, an invariant is most generally defined to be a functor between two categories. The morphisms in the first category which are transforned to identities in the second category, are the operations you consider trivial.

Not sharp enough as a piece of category theory; and better omitted, I think.

Charles Matthews 16:12, 4 Feb 2004 (UTC)

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