[Haskell-cafe] commutative monoid?

Henning Thielemann lemming at henning-thielemann.de
Sat Jun 25 22:37:43 CEST 2011

On Fri, 24 Jun 2011, Evan Laforge wrote:

> So there's a range of possible Monoid instances for each type, and
> maybe they were chosen by historical happenstance rather than some
> kind of "principle monoid" (is there such a thing?).  Is there a name
> for the thing that's like a monoid, but the operator is commutative
> too?


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