This Week
Place: Online
Faustin Adiceam (The University of Manchester)
Around the Danzer problem and the construction of dense forests.
Around the Danzer problem and the construction of dense forests.
The still open Danzer problem (1965) asks for the existence of a set with finite density intersecting any convex body of volume one. It has so far attracted a considerable number of ideas revolving around many different areas (ergodic theory, probability, dynamical systems, Diophantine approximation, harmonic analysis, the theory of quasicrystals…).
After surveying the state of the art in this problem, we will focus our attention on the construction of so-called dense forests. These are discrete point sets emerging from the weakening of the volume constraint in Danzer’s question. The emphasis will be put on the effectiveness of such construction.
Based on joint work with Yaar Solomon and Barak Weiss.
2020–21–B meetings
Upcoming Meetings
Date |
Title |
Speaker |
Abstract |
---|---|---|---|
May 13, In Online | Around the Danzer problem and the construction of dense forests.Online | Faustin Adiceam (The University of Manchester) | |
May 20, In Online | TBAOnline | Doron Puder (Tel-Aviv University) | |
May 27, In Online | TBAOnline | Yiftach Dayan (Tel-Aviv University) | |
Jun 3, In Online | Slow entropy of higher rank abelian unipotent actionsOnline | Daren Wei (The Hebrew University) | |
Jun 10, In Online | TBAOnline | Henna Koivusalo (University of Bristol) | |
Jun 17, In Online | TBAOnline | Eitan Bachmat (Ben-Gurion University) |
Past Meetings
Date |
Title |
Speaker |
Abstract |
---|---|---|---|
Mar 4, In Online | TBAOnline | ||
Mar 11, 16:00–17:00, In Online | Effective equidistribution of horospherical flows in infinite volumeOnline | Nattalie Tamam (University of California, San Diego) | |
Mar 18, In Online | A multiplicative ergodic theorem for von Neumann algebra valued cocyclesOnline | Yuqing Frank Lin (Ben-Gurion University) | |
Mar 25 | Passover break | ||
Apr 1 | Passover break | ||
Apr 8 | Holocaust Memorial Day | ||
Apr 15 | Memorial day for Israel’s fallen | ||
Apr 22, In Online | Random walks on finite partite simplicial complexesOnline | Zohar Reizis (Ben-Gurion University) | |
Apr 29, In Online | About Borel and almost Borel embeddings for Z^d actionsOnline | Nishant Chandgotia (The Hebrew University) | |
May 6, In Online | Infinite volume and infinite injectivity radiusOnline | Tsachik Gelander (Weizmann Institute) |
Seminar run by Prof. Tom Meyerovitch, Dr. Yaar Solomon and Prof. Ariel Yadin