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We use Herbrand's theorem to give a new proof that Euclid's parallel axiom is not derivable from the other axioms of first-order Euclidean geometry. Previous proofs involve constructing models of non-Euclidean geometry. This proof uses a…

Logic · Mathematics 2015-11-10 Michael Beeson , Pierre Boutry , Julien Narboux

In this paper, we establish several results related to Crouzeix's conjecture. We show that the conjecture holds for contractions with eigenvalues that are sufficiently well-separated. This separation is measured by the so-called separation…

Functional Analysis · Mathematics 2020-11-11 Kelly Bickel , Pamela Gorkin , Anne Greenbaum , Thomas Ransford , Felix Schwenninger , Elias Wegert

We reconsider the time-dependent Born-Oppenheimer theory with the goal to carefully separate between the adiabatic decoupling of a given group of energy bands from their orthogonal subspace and the semiclassics within the energy bands. Band…

Mathematical Physics · Physics 2009-11-07 Herbert Spohn , Stefan Teufel

Ergodic systems, being indecomposable are important part of the study of dynamical systems but if a system is not ergodic, it is natural to ask the following question: Is it possible to split it into ergodic systems in such a way that the…

Dynamical Systems · Mathematics 2020-12-01 Sakshi Jain , Shah Faisal

We present a diagrammatic decomposition of the transition pair correlation function for the uniform electron gas. We demonstrate explicitly that ring and ladder diagrams are dual counterparts that capture significant long- and short-ranged…

Materials Science · Physics 2019-10-16 Andreas Irmler , Felix Hummel , Andreas Grüneis

The motion of a particle carried by a liquid is described by the differential equation equating the velocity of the particle at time t to the the Eulerian velocity field at time t and at the location of the particle at that time. Assuming…

Statistical Mechanics · Physics 2009-06-18 Moshe Schwartz

Decoupling multivariate polynomials is useful for obtaining an insight into the workings of a nonlinear mapping, performing parameter reduction, or approximating nonlinear functions. Several different tensor-based approaches have been…

Numerical Analysis · Mathematics 2019-01-31 Konstantin Usevich , Philippe Dreesen , Mariya Ishteva

A proof is given of Rosenthal's \(\ell_1\) theorem.

Functional Analysis · Mathematics 2014-03-06 Ioannis Gasparis

We obtain the sharp $l^p$ decoupling for three-dimensional nondegenerate surfaces in $\mathbb{R}^6$. This can be thought of as a generalization of Bourgain and Demeter's result, which is the sharp $l^p$ decoupling for two-dimensional…

Classical Analysis and ODEs · Mathematics 2020-03-06 Changkeun Oh

We prove an $l^p$ decoupling inequality for hypersurfaces with nonzero Gaussian curvature and use it to derive a corresponding $l^p$ decoupling for curves not contained in a hyperplane. This extends our earlier work from [2]

Classical Analysis and ODEs · Mathematics 2014-07-02 Jean Bourgain , Ciprian Demeter

This work explores the geometrical/algebraic framework of Lie algebroids, with a specific focus on the decoupling and coupling phenomena within the bicocycle double cross product realization. The bicocycle double cross product theory serves…

Differential Geometry · Mathematics 2025-03-18 Begüm Ateşli , Oğul Esen , Serkan Sütlü

We streamline and generalize the recent progress in understanding entanglement between spatial regions in Abelian gauge theories. We provide an unambiguous and explicit prescription for calculating entanglement entropy in a $\mathbb Z_N$…

High Energy Physics - Theory · Physics 2014-04-08 Djordje Radicevic

A new range of uniform $L^p$ resolvent estimates is obtained in the setting of the flat torus, improving previous results of Bourgain, Shao, Sogge and Yao. The arguments rely on the $\ell^2$-decoupling theorem and multidimensional Weyl sum…

Analysis of PDEs · Mathematics 2019-07-19 Jonathan Hickman

In this paper we generalize the Deuring theorem on a reduction of elliptic curve with complex multiplication. More precisely, for an Abelian variety $A$, arising after reduction of an Abelian variety with complex multiplication by a CM…

Algebraic Geometry · Mathematics 2012-09-25 Alexey Zaytsev

We revisit the decay $\Lambda_b^0\to \Lambda_c^+ \ell^-\bar\nu$ ($\ell = e,\mu,\tau$) with a subsequent two-body decay $\Lambda_c^+ \to \Lambda^0 \pi^+$ in the Standard Model and in generic New Physics models. The decay's joint…

High Energy Physics - Phenomenology · Physics 2022-08-01 Philipp Böer , Ahmet Kokulu , Jan-Niklas Toelstede , Danny van Dyk

A generalization of the reduction technique for ODEs recently introduced by Gao and Liu is given. It is shown that the use of algebraic methods allows the extension of the procedure to much more general flows, as well as the derivation of…

Dynamical Systems · Mathematics 2019-11-06 Benito Hernández-Bermejo , Victor Fairén

A theory of matchings for finite subsets of an abelian group, introduced in connection with a conjecture of Wakeford on canonical forms for homogeneous polynomials, has since been extended to the setting of field extensions and to that of…

Combinatorics · Mathematics 2026-02-03 Mohsen Aliabadi , Jozsef Losonczy

We propose a simple derivation of renormalization group equations and Callan-Symanzik equations as decoupling theorems of the structures underlying effective field theories.

High Energy Physics - Theory · Physics 2009-11-11 Ji-Feng Yang

We introduce "book links" as a generalization of braids in open book decompositions; this new class of objects includes both braids and plats as special cases. We then prove a version of Markov's theorem in this general setting by extending…

Geometric Topology · Mathematics 2024-11-18 Roman Aranda , Fraser Binns , Margaret Doig

This paper has been withdrawn. An extended version of this work can be found in E. Cappelluti, C. Grimaldi, L. Pietronero, S. Straessler: Phys. Rev. Lett. 85, 4771 (2000) [cond-mat/0105560] and E. Cappelluti, C. Grimaldi, L. Pietronero, S.…

Superconductivity · Physics 2016-08-31 E. Cappelluti , C. Grimaldi , L. Pietronero , S. Strässler , G. A. Ummarino