# Topological rigidity as a monoidal equivalence

Abstract : A topological commutative ring is said to be rigid when for every set $X$, the topological dual of the $X$-fold topological product of the ring is isomorphic to the free module over $X$. Examples are fields with a ring topology, discrete rings, and normed algebras. Rigidity translates into a dual equivalence between categories of free modules and of topologically-free'' modules and, with a suitable topological tensor product for the latter, one proves that it lifts to an equivalence between monoids in this category (some suitably generalized topological algebras) and some coalgebras. In particular, we provide a description of its relationship with the standard duality between algebras and coalgebras, namely finite duality.
Keywords :
Document type :
Journal articles
Domain :

Cited literature [17 references]

https://hal.archives-ouvertes.fr/hal-01833662
Contributor : Laurent Poinsot <>
Submitted on : Sunday, July 15, 2018 - 11:22:14 AM
Last modification on : Sunday, June 6, 2021 - 7:58:56 PM
Long-term archiving on: : Tuesday, October 16, 2018 - 12:34:31 PM

### Files

Article_court_step_1.pdf
Files produced by the author(s)

### Citation

Laurent Poinsot. Topological rigidity as a monoidal equivalence. Communications in Algebra, Taylor & Francis, 2019, 47 (9), pp.3457-3480. ⟨10.1080/00927872.2019.1566957⟩. ⟨hal-01833662v2⟩

Record views