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math.GN2019
Some counterexamples in abstract coarse geometry
Pawel Grzegrzolka, Jeremy Siegert
We construct an example of a coarse proximity space that is not induced by any coarse structure. We then show how to "stitch" two coarse proximity spaces with homeomorphic boundari…
math.GN2018
Normality conditions of structures in coarse geometry and an alternative description of coarse proximities
Pawel Grzegrzolka, Jeremy Siegert
We introduce an alternative description of coarse proximities. We define a coarse normality condition for connected coarse spaces and show that this definition agrees with large sc…