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Hedgehog frames and a cardinal extension of normality
(Elsevier, 2019-08-23)
The hedgehog metric topology is presented here in a pointfree form, by specifying its generators and relations. This allows us to deal with the pointfree version of continuous (metric) hedgehog-valued functions that arises ...
Extension operator for the MIT Bag Model
(Institut de Mathématiques de Toulouse, 2020)
This paper is devoted to the construction of an extension operator
for the MIT bag Dirac operator on a C^2,1 bounded open set of R^3 in the spirit of
the extension theorems for Sobolev spaces. As an elementary byproduct, ...
Estimating Attraction Basin Sizes of Combinatorial Optimization Problems
(Springer, 2018-07-20)
[EN]Given a particular instance of a combinatorial optimization problem, the knowledge about the attraction basin sizes can help to analyze the difficulty encountered by local search algorithms while solving it. As calculating ...
Grigorchuk-Gupta-Sidki groups as a source for Beauvile surfaces
(EMS Press, 2020-06-25)
If G is a Grigorchuk-Gupta-Sidki group defined over a p-adic tree, where p is an odd prime, we study the existence of Beauville surfaces associated to the quotients of G by its level stabilizers stG(n). We prove that if G ...
Inflection, Canards and Folded Singularities in Excitable Systems: Application to a 3D FitzHugh–Nagumo Model
(Springer, 2020-09-07)
Specific kinds of physical and biological systems exhibit complex Mixed-Mode Oscillations mediated by folded-singularity canards in the context of slow-fast models. The present manuscript revisits these systems, specifically ...
Transporting cohomology in Lazard Correspondence
(World Scientific, 2016-07-29)
Lazard correspondence provides an isomorphism of categories between finitely generated nilpotent pro-p
groups of nilpotency class smaller than p and finitely generated nilpotent Z_p-Lie algebras of nilpotency class smaller ...
On the MIT Bag Model in the Non- relativistic Limit
(Springer, 2017-06-12)
This paper is devoted to the spectral investigation of the MIT bag model, that is, the Dirac operator on a smooth and bounded domain of R^3 with certain boundary conditions. When the mass m goes to infinity, we provide ...
Time consistent expected mean-variance in multistage stochastic quadratic optimization: a model and a matheuristic
(Springer, 2019)
In this paper, we present a multistage time consistent Expected Conditional Risk Measure for minimizing a linear combination of the expected mean and the expected variance, so-called Expected Mean-Variance. The model is ...
The cohomology of the sporadic group J2 over F3.
(De Gruyter, 2014-08-19)
We describe the cohomology ring H*(J_2; F_3) both as a subring of H*(3_+^{1+2};F_3) and with an abstract presentation. We also give its Poincaré series. Our calculational tool is the first author's spectral sequence for ...
Pro-C congruence properties for groups of rooted tree automorphisms
(Springer, 2018-12-13)
We propose a generalisation of the congruence subgroup problem for groups acting on rooted trees.
Instead of only comparing the profinite completion to that given by level stabilizers, we also compare pro-C completions ...