306 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Universidade do PortoPT174 papers
- University of CoimbraPT98 papers
- University of MinhoPT81 papers
- University of LisbonPT24 papers
- Centre National de la Recherche ScientifiqueFR22 papers
- Instituto Superior TécnicoPT22 papers
- UCLouvainBE13 papers
- Universidade Federal da BahiaBR13 papers
- Centro de Análise Matemática Geometria e Sistemas DinâmicosPT10 papers
- Pontifícia Universidade Católica do Rio de JaneiroBR10 papers
- Universidad de La LagunaES9 papers
- Universidade Federal do Rio de JaneiroBR9 papers
43 papers · 1 filter
Thick Dirac-Nambu-Goto branes on black hole backgrounds
Viktor G. Czinner
Thickness corrections to static, axisymmetric Dirac-Nambu-Goto branes embedded into spherically symmetric black hole spacetimes with arbitrary number of dimensions are studied. Fir…
Axisymmetric Dirac-Nambu-Goto branes on Myers-Perry black hole backgrounds
Viktor G. Czinner
Stationary, D-dimensional test branes, interacting with N-dimensional Myers-Perry bulk black holes, are investigated in arbitrary brane and bulk dimensions. The branes are asymptot…
Covariant and gauge-invariant linear scalar perturbations in multiple scalar field cosmologies
Artur Alho, Filipe C. Mena
We derive a set of equations monitoring the evolution of covariant and gauge-invariant linear scalar perturbations of Friedman-Lemaître-Robertson-Walker models with multiple intera…
Occupation times of exclusion processes with conductances
Tertuliano Franco, Patrícia Gonçalves, Adriana Neumann
We obtain the fluctuations for the occupation time of one-dimensional symmetric exclusion processes with speed change, where the transition rates (conductances) are driven by a gen…
Convergence of Rare Events Point Processes to the Poisson for billiards
Jorge Milhazes Freitas, Nicolai Haydn, Matthew Nicol
We show that for planar dispersing billiards the return times distribution is, in the limit, Poisson for metric balls almost everywhere w.r.t. the SRB measure. Since the Poincaré r…
Examples of compact K-contact manifolds with no Sasakian metric
Beniamino Cappelletti-Montano, Antonio De Nicola, Juan Carlos Marrero +1
Using the Hard Lefschetz Theorem for Sasakian manifolds, we find two examples of compact K-contact nilmanifolds with no compatible Sasakian metric in dimensions five and seven, res…
Groups and Semigroups Defined by Colorings of Synchronizing Automata
Daniele D'Angeli, Emanuele Rodaro
In this paper we combine the algebraic properties of Mealy machines generating self-similar groups and the combinatorial properties of the corresponding deterministic finite automa…
Slowed exclusion process: hydrodynamics, fluctuations and phase transitions
Tertuliano Franco, Patrícia Gonçalves, Adriana Neumann
This is a short survey on recent results obtained by the authors on dynamical phase transitions of interacting particle systems. We consider particle systems with exclusion dynamic…
Automaton semigroup constructions
Tara Brough, Alan J. Cain
The aim of this paper is to investigate whether the class of automaton semigroups is closed under certain semigroup constructions. We prove that the free product of two automaton s…
An analogue of the Robinson-Schensted-Knuth correspondence and non-symmetric Cauchy kernels for truncated staircases
Olga Azenhas, Aram Emami
We prove a restriction of an analogue of the Robinson--Schensted--Knuth correspondence for semi-skyline augmented fillings, due to Mason, to multisets of cells of a staircase possi…
Nonlinear fluctuations of weakly asymmetric interacting particle systems
Patricia Gonçalves, Milton Jara
We introduce what we call the second-order Boltzmann-Gibbs principle, which allows to replace local functionals of a conservative, one-dimensional stochastic process by a possibly…
A q-parameter bound for particle spectra based on black hole thermodynamics with Rényi-entropy
Tamás S. Biró, Viktor G. Czinner
By regarding the Hawking-Bekenstein entropy of Schwarzschild black hole horizons as a non-extensive Tsallis entropy, its formal logarithm, the Rényi entropy, is considered. The res…
A Coinductive Approach to Proof Search
José Espírito Santo, Ralph Matthes, Luís Pinto
We propose to study proof search from a coinductive point of view. In this paper, we consider intuitionistic logic and a focused system based on Herbelin's LJT for the implicationa…
On the conservation of Superenergy and its applications
Alfonso García-Parrado Gómez-Lobo
In this work we present a geometric identity involving the Bel-Robinson tensor which is formally similar to the Sparling identity (which involves the Einstein tensor through the Ei…
Fourier-Mukai and autoduality for compactified Jacobians II
Margarida Melo, Antontio Rapagnetta, Filippo Viviani
To every reduced (projective) curve X with planar singularities one can associate many fine compactified Jacobians, depending on the choice of a polarization on X, which are birati…
The homology graph of a higher dimensional automaton
Thomas Kahl
Higher dimensional automata, i.e. labelled precubical sets, model concurrent systems. We introduce the homology graph of an HDA, which is a directed graph whose nodes are the homol…
A simple non-bisimple congruence-free finitely presented monoid
Alan J. Cain, Victor Maltcev
We exhibit an example of a finitely presented monoid that is congruence-free and simple but not bisimple.
Review on exact and perturbative deformations of the Einstein-Straus model: uniqueness and rigidity results
Marc Mars, Filipe C. Mena, Raül Vera
The Einstein-Straus model consists of a Schwarzschild spherical vacuole in a Friedman-Lema\^ıtre-Robertson-Walker (FLRW) dust spacetime (with or without Λ). It constitutes the most…
Computation of sparse low degree interpolating polynomials and their application to derivative-free optimization
Afonso S. Bandeira, Katya Scheinberg, Luis Nunes Vicente
Interpolation-based trust-region methods are an important class of algorithms for Derivative-Free Optimization which rely on locally approximating an objective function by quadrati…
On the weight hierarchy of codes coming from semigroups with two generators
M. Delgado, J. I. Farrán, P. A. García-Sánchez +1
The weight hierarchy of one-point algebraic geometry codes can be estimated by means of the generalized order bounds, which are described in terms of a certain Weierstrass semigrou…
On Auslander-Reiten sequences for Borel-Schur algebras
Karin Erdmann, Ana Paula Santana, Ivan Yudin
We classify Borel-Schur algebras having finite representation type. We also de- termine Auslander-Reiten sequences for a large class of simple modules over Borel- Schur algebras. A…
On Topological Lattices and an Application to First Submodules
Jawad Abuhlail, Christian Lomp
We introduce the notion of a (strongly) topological lattice with respect to a subset aprototype is the lattice of (two-sided) ideal…
Entropy of non-equilibrium stationary measures of boundary driven TASEP
Cédric Bernardin, Patrícia Gonçalves, Claudio Landim
We examine the entropy of non-equilibrium stationary states of boundary driven totally asymmetric simple exclusion processes. As a consequence, we obtain that the Gibbs-Shannon ent…
Approximate Hagemann-Mitschke co-operations
Diana Rodelo, Tim Van der Linden
We show that varietal techniques based on the existence of operations of a certain arity can be extended to n-permutable categories with binary coproducts. This is achieved via wha…