Colloquium

Dear all, The colloquium returns in an online format (via ZOOM). The talk will be given by our own David Blanc. Your attendance is important and will indicate the demand for more talks in this format. ZOOM link: https://zoom.us/j/96809520900 Time:…
Read more

Place: Room 614 in the Education & Sciences Building Time: 14:00                                                    Abstract: Bounded harmonic functions on groups are closely related to random walks on groups. It has long been known that all virtually nilpotent groups are “Choquet-Deny groups”: these groups cannot support…
Read more

  Place: Room 614 in the Education & Sciences Building Time: 14:00   Abstract:   Being fractionally Calabi-Yau is a periodicity property of triangulated categories introduced by Kontsevich more than 20 years ago. It is quite rare that a finite-dimensional algebra has…
Read more

  Place: Room 614 in the Education & Sciences Building Time: 14:00   Abstract: A predictive sequence is a subset P of {n<0} such that for any finite valued zero entropy stationary ergodic process {X_j} the random variable X_0 is a function…
Read more

Place: Room 614 in the Education & Sciences Building Time: 14:00   Abstract:   Given a set S of positive measure on the unit circle, a set of integers K is an interpolation set (IS) for S if for any data {c(k)}…
Read more

Place: Room 614 in the Education & Sciences Building Time: 14:00 Abstract: Open Gromov-Witten (OGW) invariants should count pseudoholomorphic maps from Riemann surfaces with boundary to a symplectic manifold, with boundary conditions and various constraints on boundary and interior marked…
Read more

Place: Room 614 in the Education & Sciences Building Time: 14:00 We discuss how something remarkably similar to Hall’s marriage theorem appears naturally in context of a conjecture of Grothendieck in algebraic geometry, and how this is useful to prove…
Read more

Given a family of sets, a partial choice function chooses an element from some of them. The range of the function is then called a “rainbow set” (the “colors” being the sets). There are two types of conditions that are…
Read more

Place: Room 614 in the Education & Sciences Building Time: 14:00   Abstract: A king-non-attacking permutation is a permutation $\pi \in S_n$ such that $|\pi(i)-\pi(i-1)|\neq 1$ for each $i \in \{2,\dots,n\}$. We investigate the structure of the poset of these permutations under…
Read more

  Place: Room 614 in the Education & Sciences Building Time: 14:00   Abstract:   Hyperbolic manifolds play an important role in geometry and topology, and in the 1980s Gromov introduced a notion of large-scale negative curvature that is strong enough to…
Read more