Next seminar:

Speaker: Jorge Jiménez Urroz , Universitat Politècnica de Catalunya.

Title: On pairs of integers which are mutually square , Fre, 18 mars, 11.15-12.15, UU, Ång 4006

Abstract Abstract: We provide the right asymptotic, up to the constant, for the number of pairs of integers a < = A, b < = B so that a is a square residue modulo b and viceversa. The techniques include a proper sieve of the squares, and then some integration of L functions via Perron's Formula, together with some estimates of character sums.

Past seminars, fall 2009-spring 2011:

Corina Ulcigrai, University of Bristol: Ergodic properties of area-preserving flows on surfaces , Feb 25, 11.15-12.15

Magnus Aspenberg, Jacobs University, Bremen: Small divisors and binomial recursions, Dec 7, 15.15-16.15

Masha Saprykina, KTH: Examples of Hamiltonian systems with Arnold diffusion, Nov 9, 13.15-14.15

Hans Koch, University of Texas at Austin: Computer-assisted analysis of some elliptic and parabolic PDEs, Oct 13, 13.15-14.15

Hans Koch, University of Texas at Austin: Break up of invariant tori, and Universality, Oct 12, 13.15-14.15

Thomas Jordan, Bristol University: Dimension of numbers with strictly increasing continued fraction expansion, Sept 14, 10.15-11.15.

Walter Craig, McMAster University: On the size of the Navier - Stokes singular set, May 21, 13.15-14.15.

Min Lee, Columbia University: Approximate converse theorem for GL(3), May 19, 15:15-16.15.

Michael Yampolsky, University of Toronto: Computablity and complexity of Julia sets, May 3, 15:15-16.15, May 4 13:15-14:15.

Alexey Teplinsky, Natl. Acad. Sc. of Ukraine: Rigidity theory for circle diffeomorphisms with singularities, April 16, 13:15-14.15.

Mark Pollicott, University of Warwick: Dynamical Zeta function: past results and future prospects, March 24, 13:15-14.15.

Henk Bruin, University of Surrey: Lebesgue ergodic behaviour for Fibonacci-like interval maps, March 15, 13:15-14.15.

Ale Jan Homburg, University of Amsterdam: Bifurcations from homoclinic networks, March 5, 13.15-14.15

Camilla Hollanti, University of Turku: Applications of algebraic number theory in space-time coding, March 4, 13.15-14.15

Niklas Brännström, University of Helsinki: Drift in the slow dynamics of an a-priori chaotic slow-fast Hamiltonian system, Feb 12, 13.15-14.15

Jimi Truelsen, Cambridge: Mass equidistribution of Eisenstein series on GL(2), Nov 23, 11.15-12.15

Neil Dobbs, KTH: Typical behaviour in exponential dynamics, Thur, Oct 22th, 13:15.

Sergey Kuznetsov, Saratov University, Russia: Examples of realizable systems with hyperbolic attractors, Oct 15, 13:15

Konstantin Khanin, Toronto: Renormalization and rigidity in one-dimensional dynamics, Oct 13, 13:15

John H. Hubbard, Cornell University : Pinched ball models for Henon maps (with Remus Radu and Reluca Tanase), Oct 9, 14:15, Abstract.
Ilya V. Schurov, National Research University Higher School of Economics, Russia : Slow-fast dynamics in differential equations and maps, May 3, 2013, 9:00, KTH, Abstract.