Articles de revista: Enviaments recents
Ara es mostren els items 1-12 de 184
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An equivariant Reeb–Beltrami correspondence and the Kepler–Euler flow
(Royal Society, 2024-01-31)
Article
Accés obertWe prove that the correspondence between Reeb and Beltrami vector fields presented in Etnyre & Ghrist (Etnyre, Ghrist 2000 Nonlinearity 13, 441–458 (doi:10.1088/0951-7715/13/2/306)) can be made equivariant whenever additional ... -
Bohr–Sommerfeld quantization of b-symplectic toric manifolds
(2023)
Article
Accés obertWe define the Bohr-Sommerfeld quantization via T -modules for a b-symplectic toric manifold and show that it coincides with the formal geometric quantization of [Victor W. Guillemin, Eva Miranda, and Jonathan Weitsman. On ... -
Identifiability in robust estimation of tree structured models
(2024-02-01)
Article
Accés restringit per política de l'editorialConsider the problem of learning undirected graphical models on trees from corrupted data. Recently Katiyar, Shah, and Caramanis showed that it is possible to recover trees from noisy binary data up to a small equivalence ... -
New slope inequalities for families of complete intersections
(2024-01-01)
Article
Accés obertWe prove f-positivity of Ox (1) for arbitrary dimensional fibrations over curves f:X¿B whose general fibre is a complete intersection. In the special case where the family is a global complete intersection, we prove numerical ... -
Reduction theory for singular symplectic manifolds and singular forms on moduli spaces
(2023-09-01)
Article
Accés obertThe investigation of symmetries of b-symplectic manifolds and folded-symplectic manifolds is well-understood when the group under consideration is a torus (see, for instance, [25,21, 28] for b-symplectic manifolds and ... -
Valuations with an infinite limit-depth
(2023-08-08)
Article
Accés restringit per política de l'editorialWe construct a field K and a valuation-algebraic valuation on K[x] , whose underlying Maclane–Vaquié chain consists of an infinite (countable) number of limit augmentations. -
Multisymplectic constraint analysis of scalar field theories, Chern-Simons gravity, and bosonic string theory
(Elsevier, 2023-02)
Article
Accés obertThe (pre)multisymplectic geometry of the De Donder–Weyl formalism for field theories is further developed for a variety of field theories including a scalar field theory from the canonical Klein-Gordon action, the electric ... -
Grid equivalent representation of power systems with penetration of power electronics
(Institute of Electrical and Electronics Engineers (IEEE), 2023-03-13)
Article
Accés obertThe Thévenin equivalent is considered as the standard grid equivalent for power system analysis. The integration on power electronics components in the power systems introduces non-linear operation characteristics that ... -
From 2N to infinitely many escape orbits
(Pleiades Publishing, 2023-07-31)
Article
Accés restringit per política de l'editorial—In this short note, we prove that singular Reeb vector fields associated with generic b-contact forms on three dimensional manifolds with compact embedded critical surfaces have either (at least) 2N or an infinite number ... -
Constructions of b-semitoric systems
(2023-07-01)
Article
Accés obertIn this article, we introduce b-semitoric systems as a generalization of semitoric systems, specifically tailored for b-symplectic manifolds. The objective of this article is to furnish a collection of examples and investigate ... -
Contact structures with singularities: from local to global
(Elsevier, 2023-10-01)
Article
Accés obertIn this article we introduce and analyze in detail singular contact structures, with an emphasis on bm -contact structures, which are tangent to a given smooth hypersurface Z and satisfy certain transversality conditions. ... -
Designing weights for quartet-based methods when data are heterogeneous across lineages
(Springer Nature, 2023-06-13)
Article
Accés obertHomogeneity across lineages is a general assumption in phylogenetics according to which nucleotide substitution rates are common to all lineages. Many phylogenetic methods relax this hypothesis but keep a simple enough ...