Sebastian Jachimek

Sebastian Jachimek: Combinatorial Banach spaces

Tuesday, March 21, 2023 17:00

Location: room A.4.1 C-19

Speaker:
Sebastian Jachimek

Title: Combinatorial Banach spaces

Abstract: Combinatorial space is a type of Banach space induced by (some) family of sets in a certain way. During the talk I will present examples of families (of subsets of natural numbers) and spaces related with them. Furthermore, I will consider properties of these spaces, in particular in the context of containing isomorphic copy of \(c_0\) and \(\ell_1\).

Sebastian Jachimek: A Banach space induced by a compact family

Tuesday, January 25, 2022 17:00

Location: room 605, Mathematical Institute, University of Wroclaw

Speaker:
Sebastian Jachimek

Title: A Banach space induced by a compact family

Abstract: In the talk we will present an example of a Banach space induced (in some particular way) by some compact family of subsets of natural numbers. In particular, we will prove that this space is \(l_1\)-saturated and does not have the Schur property.