Upcoming Events

  • School - Arithmetic groups(*) Mar 12, 16:30-Mar 17, 12:00, 2017, Mitzpe Ramon.

    There will be five main Mini-Courses as follows:

    1. Higher rank lattices rigidity and arithmeticity, Tsachik Gelander (Weizmann).
    2. Exotic lattices, Pierre-Emmanuel Caprace (U.C. Louvin).
    3. Strong approximation in linear groups, Nikolay Nikolov (Oxford).
    4. Arithmetic hyperbolic 3-manifolds, Nicolas Bergeron (Jussieu)
    5. The congruence subgroup property, Nir Avni (Northwestern).

Recent Events

  • Special lecture Jan 16, 10:00-11:00, 2017, Math building (58), room -101, BGU.

    Speaker: Anton Khoroshkin (HSE, Moscow)

    Little discs operad, graph complexes and applications

    The little cubes operad is one of the key objects of the deformation theory of
    the last decades. I will outline its geometric definition, some combinatorial
    models and different known results and applications.

    The framed little cubes operad is much less studied and I will report on some
    recent results of related deformation theory, explain relationships with
    Deligne-Mumford compactifications of stable curves of zero genus and use it to
    prove some conjectures stated for braid and cacti groups whose representations
    appear naturally as tensor products in tensor and coboundary categories
    correspondingly.

  • טקס מלגת הצטיינות על-שם גאוכמן(*) Jan 3, 14:00-16:00, 2017, בנין 37, חדר 202. gauchman.pdf

  • Special lecture in Geometry and Physics Nov 21, 11:00-12:00, 2016, Math building (58), room 201, BGU.

    Dynamics of Spacetime — Einstein’s equations as a geometric flow.

    Speaker: Dr. David Fajman (Vienna)

    The interpretation of Einstein’s equations as a geometric flow (the Einstein flow) allows to study the evolution of spacetimes from a dynamical point of view. Two types of initial data are mainly considered: Firstly, asymptotically flat data describing initial states of isolated self-gravitating systems and secondly, data on closed manifolds describing initial states for cosmological spacetimes. Studying the evolution of data under the flow we aim to understand its long-time behavior and the global geometry of its time-development. We are interested in the construction of static solutions (or static up to a time-rescaling) as potential attractors of the flow and their nonlinear stability, completeness and incompleteness properties of spacetimes and singularity formation. We present new methods to construct and study solutions by geometric and analytical tools as well as several results in the directions mentioned above. We consider in particular the case of matter models coupled to the Einstein equations, which turns out to provide several interesting phenomena and new classes of solutions.

Some older events may be found on the pages of the Center for Advanced Studies.

Past Events

(Star) marks events partly supported by the Center for Advanced Studies in Mathematics at Ben-Gurion University