Previous Conferences & Workshops

Let G be a finitely generated group equipped with the word metric. Assume that G does not admit a bi-Lipschitz embedding into Hilbert space. How can we quantify the extent to which G is non-Hilbertian? A natural approach is to consider the Hilbert...

An important result of Waldspurger relates the central value of quadratic base change L-functions for GL(2) to period integrals over tori. Subsequently this result was reproved by Jacquet using the relative trace formula. We will explain some...

We give a probabilistic protocol that allows any two points in R^d to agree on a nearby integer lattice point in Z^d . The protocol uses shared randomness, but no communication. If the distance between the two points is delta, the probability of...

We prove that every key exchange protocol in the random oracle model in which the honest users make at most $n$ queries to the oracle can be broken by an adversary making $O(n^2)$ queries to the oracle. This improves on the previous $\Tilde{O}(n^6)$...

For a squarefree integer $d$ we ask, if the negative Pell equation $x^2-dy^2 = -1$ is solvable over the integers. By easy considerations we see that in this case $d>0$ and that all odd prime divisors of $d$ are congruent to 1 modulo 4. Now we call a...