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math.MG2021
Coproximinality of linear subspaces in generalized Minkowski spaces
Thomas Jahn, Christian Richter
We show that, for vector spaces in which distance measurement is performed using a gauge, the existence of best coapproximations in -codimensional closed linear subspaces implie…
math.MG2018
Uniqueness of circumcenters in generalized Minkowski spaces
Bernardo González Merino, Thomas Jahn, Christian Richter
In an -dimensional normed space every bounded set has a unique circumball if and only if every set of cardinality two has a unique circumball and if and only if the unit ball of…
math.MG2016
Is a complete, reduced set necessarily of constant width?
René Brandenberg, Bernardo González Merino, Thomas Jahn +1
Is it true that a convex body being complete and reduced with respect to some gauge body is necessarily of constant width, that is, satisfies for some ? W…