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math.CT2025
A Cartesian Promonoidal Kernel on and a Hadamard Contraction of
Florian Lengyel
Pointwise multiplication of nondecreasing maps defines simplicial maps \(H_{p,q}:Δ^p\timesΔ^q\toΔ^{pq}\) for nonnegative integers \(p,q\). We express these maps using Day's promono…
math.CT2001★ 2 cited
Recursion categories of coalgebras
Florian Lengyel
We construct recursion categories from categories of coalgebras. Let be a nontrivial endofunctor on the category of sets that weakly preserves pullbacks and such that the categ…