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Jiri Adamek, TU Braunschweig
Monday 13 June 2011, 13:15-14:30
Colimits of Monads
- đ¤ Speaker: Jiri Adamek, TU Braunschweig
- đ Date & Time: Monday 13 June 2011, 13:15 - 14:30
- đ Venue: MR12, Centre for Mathematical Sciences
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Nathan Bowler
Abstract
Colimits in the category of monads on a given category C are studied. For example coequalizers always exist, assuming C is complete and wellpowered.
For monads on Set a coproduct exists whenever the monads have arbitrarily large common fixed points. This condition is also necessary in case of free monads. Two free monads are presented whose coproduct does not exist.
The result of N. Ghani and T. Uustalu that coproducts of ideal monads are ideal is generalized to all colimits of ideal monads.
This is joint work with P.B. Levy and S. Milius.
Series This talk is part of the Category Theory Seminar series.
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