Monday, 6 April, 2015
Jay Armas, Matthias Blau

We construct several classes of worldvolume effective actions for black holes by integrating out spatial sections of the worldvolume geometry of asymptotically flat black branes. This provides a...

Monday, 6 April, 2015
Mahouton Norbert Hounkonnou, Partha Guha, Tudor S. Ratiu

We discuss the appearence of left symmetry in a generalized Virasoro algebra. The necessary and sufficient condition for this algebra to be a quasiassociative algebra with the defined...

Friday, 3 April, 2015
Marco Baggio, Matthias R. Gaberdiel, Cheng Peng

The symmetric orbifold of K3 is believed to be the CFT dual of string theory on AdS3 x S3 x K3 at the tensionless point. For the case when the K3 is described by the orbifold T4/Z2, we identify...

Wednesday, 1 April, 2015
A. Pelayo, T. S. Ratiu, S. Vu Ngoc

We describe the bifurcation diagrams of almost toric integrable Hamiltonian systems on a four dimensional symplectic manifold M, not necessarily compact. We prove that, under a weak assumption,...

Journal of Symplectic Geometry, 13(2), 343-386, 2015
Wednesday, 1 April, 2015
François Gay-Balmaz, Michael Monastyrsky, Tudor S. Ratiu

We consider a general approach for the process of Lagrangian and Hamiltonian reduction by symmetries in chiral gauge models. This approach is used to show the complete integrability of several...

Communications in Mathematical Physics, April 2015, Volume 335, Issue 2, pp 609-636
Monday, 30 March, 2015
Benoit Fresse, Thomas Willwacher

We establish that $E_n$-operads satisfy a rational intrinsic formality theorem for $n\geq 3$. We gain our results in the category of Hopf cooperads in cochain graded dg-modules, which...

Monday, 30 March, 2015
Camille Bonvin, Chris Clarkson, Ruth Durrer, Roy Maartens, Obinna Umeh

It has recently been shown that second-order corrections to the background distance-redshift relation can build up significantly at large redshifts, due to an aggregation of gravitational...

Friday, 27 March, 2015
Stéphane Benoist, Laure Dumaz, Wendelin Werner

We study random two-dimensional spanning forests in the plane that can be viewed both in the discrete case and in their scaling limit as slight perturbations of an uniformly chosen spanning tree...

Friday, 27 March, 2015
Wendelin Werner

We present a setup that enables to define in a concrete way a renormalization flow for the FK-percolation models from statistical physics (that are closely related to Ising and Potts models). In...

Monday, 16 March, 2015
Niklas Beisert, Marius de Leeuw, Panchali Nag

We discuss a formulation of the fusion procedure for integrable models which is suitable for application to non-standard R-matrices. It allows for construction of bound state R-matrices for AdS/...

Sunday, 1 March, 2015
Tudor S. Ratiu, O.G. Smolyanov

In this work, the authors discuss representations of solutions of equations describing the diffusion and quantum dynamics of (quasi-)particles with time and position dependent (even anisotropic...

Doklady Mathematics,91(1), 1-4.
Sunday, 1 March, 2015
John E. Gough, Tudor S. Ratiu, Oleg G. Smolyanov

Noether’s theorem on constants of the motion of dynamical systems has recently been extended to classical dissipative systems (Markovian semi-groups) by Baez and Fong [J. Math. Phys. 54, 013301...

J. Math. Phys. 56, 022108 (2015)