Monday, 11 February, 2019
Grigory Mikhalkin, Stepan Orevkov

This is a sequel to the paper \cite{MO-mw} which identified maximally writhed algebraic links in $\rp^3$ and classified them topologically. In this paper we prove that all maximally writhed...

Friday, 8 February, 2019
Hugo Duminil-Copin, Gady Kozma, Vincent Tassion

We study the size of the near-critical window for Bernoulli percolation on \mathbb Z^d. More precisely, we use a quantitative Grimmett-Marstrand theorem to prove that the correlation length,...

Friday, 8 February, 2019
Matteo Bonforte, Alessio Figalli

We investigate the homogeneous Dirichlet problem for the Fast Diffusion Equation u_t=\Delta u^m, posed in a smooth bounded domain \Omega\subset \mathbb{R}^N, in the exponent range m_s=(N-2)_+/(N...

Saturday, 26 January, 2019
Stefano Marmi, Corinna Ulcigrai, Jean-Christophe Yoccoz

We introduce two Diophantine conditions on rotation numbers of interval exchange maps (i.e.m) and translation surfaces: the \emph{absolute Roth type condition} is a weakening of the notion of...

Thursday, 24 January, 2019
Hugo Duminil-Copin, Vincent Tassion

The study of crossing probabilities - i.e. probabilities of existence of paths crossing rectangles - has been at the heart of the theory of two-dimensional percolation since its beginning. They...

Wednesday, 23 January, 2019
Seung-Joo Lee, Wolfgang Lerche, Timo Weigand

We analyse the Weak Gravity Conjecture for chiral four-dimensional F-theory compactifications with N=1 supersymmetry. Extending our previous work on nearly tensionless heterotic strings in six...

Sunday, 30 December, 2018
Chiara Camere, Alberto Cattaneo, Robert Laterveer

We consider a 10-dimensional family of Lehn-Lehn-Sorger-van Straten hyperkähler eightfolds which have a non-symplectic automorphism of order 3. Using the theory of finite-dimensional motives, we...

Friday, 28 December, 2018
Enis Belgacem, Andreas Finke, Antonia Frassino, Michele Maggiore

We study the impact of the limit on |\dot{G}|/G from Lunar Laser Ranging on "nonlocal gravity", i.e. on models of the quantum effective action of gravity that include nonlocal terms relevant in...

Friday, 28 December, 2018
Matthias Blau, Keita Kaniba Mady, K.S. Narain, George Thompson

The path integral for the partition function of Chern-Simons gauge theory with a compact gauge group is evaluated on a general Seifert 3-manifold. This extends previous results and relies on...

Saturday, 22 December, 2018
Basundhara Ghosh, Ruth Durrer

Recently Dizgah & Durrer have shown that the E_g statistics, useful to test theories of modified gravity, is plagued by additional scale and bias dependent lensing contributions. In this...

Friday, 21 December, 2018
Enea Di Dio, Ruth Durrer, Roy Maartens, Francesco Montanari, Obinna Umeh

We compute the full-sky redshift-dependent angular bispectrum of galaxy number counts at tree-level, including nonlinear clustering bias and estimating numerically for the first time the effect...

Friday, 14 December, 2018
Artem Borin, Ines Safi, Eugene Sukhorukov

The Coulomb drag effect arises due to electron-electron interactions, when two metallic conductors are placed in close vicinity to each other. It manifests itself as a charge current or voltage...