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On two conjectures of Faith
Journal article   Open access   Peer reviewed

On two conjectures of Faith

M Haim, M.C Iovanov and B Torrecillas
Journal of algebra, Vol.367, pp.166-175
10/01/2012
DOI: 10.1016/j.jalgebra.2012.06.003
url
https://doi.org/10.1016/j.jalgebra.2012.06.003View
Published (Version of record) Open Access

Abstract

We prove that a profinite algebra whose left (right) cyclic modules are torsionless is finite dimensional and QF. We give a relative version of the notion of left (right) PF ring for pseudocompact algebras and prove it is left–right symmetric and dual to the notion of quasi-co-Frobenius coalgebras. We also prove two ring theoretic conjectures of Faith, in the setting (and supplementary hypothesis) of profinite algebras: any profinite semiartinian selfinjective algebra is finite dimensional and QF, and any FGF profinite algebra is finite dimensional QF.
Faith conjecture Coalgebra PF ring FGF conjecture Ultrafilter QF ring

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