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20112026
most citedFixed point theorem for reflexive Banach spaces and uniformly convex non positively curved metric spaces

7 citations · 31 across the 23 of their papers we have counts for

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math.CO2024

Coboundary expansion of coset complexes

Tali Kaufman, Izhar Oppenheim, Shmuel Weinberger

Coboundary expansion is a high dimensional generalization of the Cheeger constant to simplicial complexes. Originally, this notion was motivated by the fact that it implies topolog…

math.GR2024

Property (T) for groups acting on affine buildings

Izhar Oppenheim

We prove that a group acting geometrically on a thick affine building has property (T). A more general criterion for property (T) is given for groups acting on partite complexes.