# A type $$F_{\infty}$$ solution to the von Neumann-Day problem.

18.01.2022 13:15 - 14:45

Yash Lodha (U Vienna)

In this talk, I will describe a finitely presented group of piecewise projective homeomorphisms of the real line, which is nonamenable and does not contain nonabelian free subgroups. Moreover, the group is the fundamental group of an aspherical CW complex with finitely many cells in each dimension. This is partly joint work with Justin Moore.

Organiser:

#### H. Grobner, A. Minguez-Espallargas, A. Mellit

Location:
Zoom-Meeting ID: 431 655 310, Passcode: 0cnL5d