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Results tagged with monads
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user 102001
8
votes
1
answer
396
views
Monads on Set with trivial algebras
In an earlier post, What is known about the category of monads on Set? … Does anyone know a proof (or a reference to a proof) of this fact--that
these are the only two monads on sets having trivial algebras? …
- 151
7
votes
0
answers
175
views
Beck's Theorem and the category of endos
Many years ago, Lawvere showed that the forgetful functor $U: \mathbf{Endo}\to \mathbf{Set}$ has a left adjoint $F$ if and only if $\mathbf{Set}$ has a natural numbers object, where $\mathbf{Endo}$ is …
- 151