9 papers
Some remarks on almost locally uniformly rotund points
Carlo Alberto De Bernardi, Jacopo Somaglia
We study the relations between different notions of almost locally uniformly rotund points that appear in literature. We show that every non-reflexive Banach space admits an equiva…
Tilings and coverings by balls in
Carlo Alberto De Bernardi, Tommaso Russo, Åeyda Sezgek +1
A famous result of Klee from 1981 is that the Banach space admits a disjoint tiling by balls of radius , for all cardinals with . Klee also observed…
Packings in classical Banach spaces
Carlo Alberto De Bernardi, Tommaso Russo, Åeyda Sezgek +1
We obtain several new results on the simultaneous packing and covering constant of a Banach space , and its lattice counterpart $γ^*(\mathcal{X})$.…
Global Lipschitz extension preserving the slope
Nicolò De Ponti, Jacopo Somaglia
We show that every real-valued Lipschitz function on a subset of a metric space can be extended to the whole space while preserving the slope and, up to a small error, the global L…
Nonexistence results for the semilinear wave equation on graphs
Dario Daniele Monticelli, Fabio Punzo, Jacopo Somaglia
We investigate the semilinear wave equation with potential on weighted graphs. We establish sufficient conditions for the nonexistence of global-in-time solutions. Both nonnegative…
Lattice tilings of Hilbert spaces
Carlo Alberto De Bernardi, Tommaso Russo, Jacopo Somaglia
We construct a bounded and symmetric convex body in (for certain cardinals ) whose translates yield a tiling of . This answers a question due to Fonf a…