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math.DS2021
Conley index theory without index pairs. I: The point-set level theory
Yosuke Morita
We propose a new framework for Conley index theory. The main feature of our approach is that we do not use the notion of index pairs. We introduce, instead, the notions of compacti…
math.DG2021★ 2 cited
Cartan projections of some non-reductive subgroups and proper actions on homogeneous spaces
Yosuke Morita
Kobayashi [Duke Math. J. (1992)] gave a necessary condition for the existence of compact Clifford-Klein forms in terms of Cartan projections and non-compact dimensions of reductive…