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math.GT2025
Self-covering, finiteness, commutativity, and fibering over tori
Lizhen Qin, Yang Su
A topological space is called self-covering if it is a nontrivial cover of itself. We prove that, under mild assumptions, a closed self-covering manifold with an abelian fundamenta…
math.GT2024
Free circle actions on -connected -manifolds
Yi Jiang, Yang Su
In this paper, we determine those -connected -manifolds with torsion free homology that admit free circle actions up to almost diffeomorphism, provided that $n\equiv…
math.GT2024
Mapping class group of manifolds which look like -dimensional complete intersections
Matthias Kreck, Yang Su
In this paper we compute the mapping class group of closed simply-connected 6-manifolds which look like complete intersections, i.~e.~ and $…