Mathematics > Rings and Algebras
arXiv:2512.24881 (math)
[Submitted on 31 Dec 2025 (v1), last revised 7 Aug 2026 (this version, v4)]
Abstract:We describe totally compatible structures on the Jacobson radical of the incidence algebra of a finite poset over a field. We show that such structures are in general non-proper.
Submission history
From: Mykola Khrypchenko [view email]
[v1]
Wed, 31 Dec 2025 14:17:21 UTC (18 KB)
[v2]
Mon, 23 Mar 2026 01:09:31 UTC (18 KB)
[v3]
Sat, 28 Mar 2026 11:53:54 UTC (58 KB)
[v4]
Fri, 7 Aug 2026 11:38:39 UTC (58 KB)
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