> I mean: without knowing something about the semantic of those methods, > how do we know that: > > sage: x.antipode() > > will return an element of the algebra, and therefore the result shall > be retracted back, whereas: > > sage: x.counit() > > will return an element of the ground field which needs no transformation? > > Ah, right, I agree (he says with a sheepish grin). Andrew
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