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To an exact endofunctor of a triangulated category with a split-generator, the notion of entropy is given by Dimitrov-Haiden-Katzarkov-Kontsevich, which is a (possibly negative infinite) real-valued function of a real variable. In this…

Algebraic Geometry · Mathematics 2017-07-19 Kohei Kikuta , Atsushi Takahashi

We present a general method for calculating R\'enyi entropies in the ground state of a one-dimensional critical system with mixed open boundaries, for an interval starting at one of its ends. In the conformal field theory framework, this…

Statistical Mechanics · Physics 2025-11-12 Benoit Estienne , Yacine Ikhlef , Andrei Rotaru

A classical problem in dynamical systems is to measure the complexity of a map in terms of their orbits. One of the main tools we have to achieve this goal is entropy. However, many interesting families of dynamical systems have every…

Dynamical Systems · Mathematics 2022-07-01 Javier Correa , Hellen de Paula

We show the flexibility of the metric entropy and obtain additional restrictions on the topological entropy of geodesic flow on closed surfaces of negative Euler characteristic with smooth non-positively curved Riemannian metrics with fixed…

Dynamical Systems · Mathematics 2020-08-07 Thomas Barthelmé , Alena Erchenko

In this paper we focus on the Hamilton-Jacobi method to determine the entropy of a self-dual black hole by using linear and quadratic GUPs(generalized uncertainty principles). We have obtained the Bekenstein-Hawking entropy of self-dual…

High Energy Physics - Theory · Physics 2015-09-30 M. A. Anacleto , F. A. Brito , E. Passos

The paper develops a continiuty method for solutions of the Abreu equation, which include extremal metrics on toric surfaces. Results are obtained, assuming a hypothesis (the "M-condition") on the solutions.

Differential Geometry · Mathematics 2007-05-23 S. K. Donaldson

In this paper we discuss some of the recent developments on derived equivalences in algebraic geometry.

Algebraic Geometry · Mathematics 2007-05-23 Lutz Hille , Michel Van den Bergh

We provide a field-theoretic method to calculate entanglement entropy of CFT in all dimensions. This method works for entangling surfaces of arbitrary shape. The formalism manifests a field-theoretic proof of the Ryu-Takayanagi formula.

High Energy Physics - Theory · Physics 2026-01-06 Xin Jiang , Haitang Yang

Using the Fourier transform, we obtain upper bounds for sums of eigenvalues of the free plate.

Spectral Theory · Mathematics 2017-11-01 Barbara Brandolini , Francesco Chiacchio , Jeffrey J. Langford

In this paper we classify all Riemann surfaces having a large abelian group of automorphisms, that is having an abelian group of automorphism of order strictly bigger then $4(g-1)$, where $g$ denotes as usual the genus of the Riemann…

Algebraic Geometry · Mathematics 2007-05-23 Clelia Lomuto

We study macroion adsorption on planar surfaces, through a simple model. The importance of entropy in the interfacial phenomena is stressed. Our results are in qualitative agreement with available computer simulations and experimental…

Soft Condensed Matter · Physics 2007-05-23 Felipe Jimenez-Angeles , Marcelo Lozada-Cassou

First we show that any group of automorphisms of null-entropy of a projective hyperk\"ahler manifold $M$ is almost abelian of rank at most $\rho(M) - 2$. We then characterize automorphisms of a K3 surface with null-entropy and those with…

Algebraic Geometry · Mathematics 2007-05-23 Keiji Oguiso

We establish a, and conjecture further, relationship between the existence of subvarieties representing minimal cohomology classes on principally polarized abelian varieties, and the generic vanishing of certain sheaf cohomology. The main…

Algebraic Geometry · Mathematics 2007-06-26 Giuseppe Pareschi , Mihnea Popa

This paper is the first part in a series of three papers devoted to the study of enumerative invariants of abelian surfaces through the tropical approach. In this paper, we consider the enumeration of genus $g$ curves of fixed degree…

Algebraic Geometry · Mathematics 2024-11-27 Thomas Blomme

A method to calculate the algebraic entropy of a mapping which can be lifted to an isomorphism of a suitable rational surfaces (the space of initial values) are presented. It is shown that the degree of the $n$th iterate of such a mapping…

Exactly Solvable and Integrable Systems · Physics 2009-11-07 Tomoyuki Takenawa

We compute entropies in a large family of K3 surface automorphisms in (P^1)^3. In keeping with a result by Xie, we find that the entropies vary in a lower semi-continuous manner as the Picard ranks of the K3 surfaces vary.

Dynamical Systems · Mathematics 2015-08-20 Paul Reschke , Bar Roytman

I give an algorithm for computing the full space of automorphic forms for definite unitary groups over Q, and apply this to calculate the automorphic forms of level $G(Z-hat)$ and various small weights for an example of a rank 3 unitary…

Number Theory · Mathematics 2011-04-19 David Loeffler

Generalizing the method of Faltings-Serre, we rigorously verify that certain abelian surfaces without extra endomorphisms are paramodular. To compute the required Hecke eigenvalues, we develop a method of specialization of Siegel…

Number Theory · Mathematics 2020-11-23 Armand Brumer , Ariel Pacetti , Cris Poor , Gonzalo Tornaria , John Voight , David S. Yuen

An elementary collision model of a molecular reservoir is considered upon which an external field is applied and the work is dissipated into heat. To realize macroscopic irreversibility at the microscopic level, we introduce a ``graceful''…

Quantum Physics · Physics 2007-05-23 Lajos Diósi , Tova Feldmann , Ronnie Kosloff

This note provides an insight to the diophantine properties of abelian surfaces with quaternionic multiplication over number fields. We study the fields of definition of the endomorphisms on these abelian varieties and the images of the…

Number Theory · Mathematics 2007-05-23 Luis V. Dieulefait , V. Rotger