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We establish a connection between the superconformal index of $\mathcal{N}=4$ $U(N)$ SYM and the elliptic Ruijsenaars-Schneider integrable system. The index admits an expression in terms of elliptic Macdonald polynomials, which leads to a…

High Energy Physics - Theory · Physics 2026-04-02 Gao-fu Ren , Min-xin Huang

Dual decomposition is a powerful technique for deriving decomposition schemes for convex optimization problems with separable structure. Although the Augmented Lagrangian is computationally more stable than the ordinary Lagrangian, the…

Optimization and Control · Mathematics 2013-02-14 Ion Necoara , Johan A. K. Suykens

A polynomial deformation of the Kowalewski top is considered. This deformation includes as a degeneration a new integrable case for the Kirchhoff equations found recently by one of the authors. A $5\times 5$ matrix Lax pair for the deformed…

Exactly Solvable and Integrable Systems · Physics 2007-05-23 Vladimir V. Sokolov , Andrey V. Tsiganov

As a necessary step in constructing elliptic matrix models, which preserve the superintegrability property $<char>\sim {\rm char}$, we suggest an elliptic deformation of the peculiar loci $p_k^{\Delta_n}$, which play an important role in…

High Energy Physics - Theory · Physics 2021-03-23 A. Mironov , A. Morozov

We study Yang-Baxter sigma models with deformed 4D Minkowski spacetimes arising from classical $r$-matrices associated with $\kappa$-deformations of the Poincar\'e algebra. These classical $\kappa$-Poincar\'e $r$-matrices describe three…

High Energy Physics - Theory · Physics 2016-05-04 Andrzej Borowiec , Hideki Kyono , Jerzy Lukierski , Jun-ichi Sakamoto , Kentaroh Yoshida

We propose a scheme for the construction of deformed matrix geometries using Landau models. The Landau models are practically useful tools to extract matrix geometries. The level projection method however cannot be applied straightforwardly…

High Energy Physics - Theory · Physics 2025-02-07 Kazuki Hasebe

We develop a new nonlinear method to model structure formation in general relativity from a generalization of the relativistic Lagrangian perturbation schemes, controlled by Szekeres (and LTB) exact solutions. The overall approach can be…

General Relativity and Quantum Cosmology · Physics 2023-01-19 Ismael Delgado Gaspar , Thomas Buchert , Jan J. Ostrowski

We describe a class of algebraically solvable SUSY models by considering the deformation of invariant polynomial flags by means of the Darboux transformation. The algebraic deformations corresponding to the addition of a bound state to a…

Exactly Solvable and Integrable Systems · Physics 2011-04-13 D. Gomez-Ullate , N. Kamran , R. Milson

This article is a description of elasticity theory for readers with mathematical background. The first sections are an abridgment of parts of the book by Marsden and Hughes, including a compact identification of the equations of motion as…

Mathematical Physics · Physics 2013-12-25 James Mathews

In this research paper, we present an exact matrix form analytical solution of the multi-dimensional generalized Langevin equation with quadratic potentials. Our investigation provides detailed expressions for the two-dimensional…

Statistical Mechanics · Physics 2025-11-26 Rana Imran Mushtaq , Chunyang Wang , Shi Zhi , Zengxuan Zhao , J M Nyasulu

Compressible Mooney-Rivlin theory has been used to model hyperelastic solids, such as rubber and porous polymers, and more recently for the modeling of soft tissues for biomedical tissues, undergoing large elastic deformations. We propose a…

Numerical Analysis · Mathematics 2025-10-20 Suzanne M. Shontz , Stephen A. Vavasis

Using the procedure initiated in \cite{Ma2013}, we deform Lax-type equations though a scaling of the time parameter. This gives an equivalent (deformed) equation which is integrable in terms of power series of the scaling parameter. We then…

Analysis of PDEs · Mathematics 2015-10-28 Jean-Pierre Magnot

We investigate the $h$-deformed quantum (super)group of $2\times 2$ matrices and use a kind of contraction procedure to prove that the $n$-th power of this deformed quantum (super)matrix is quantum (super)matrix with the deformation…

High Energy Physics - Theory · Physics 2009-11-10 Yun Li , Sicong Jing

We consider finite deformations of the Hull--Strominger system. Starting from the heterotic superpotential, we identify complex coordinates on the off-shell parameter space. Expanding the superpotential around a supersymmetric vacuum leads…

High Energy Physics - Theory · Physics 2022-02-04 Anthony Ashmore , Xenia de la Ossa , Ruben Minasian , Charles Strickland-Constable , Eirik Eik Svanes

We construct a new nonlinear deformed Schr\"odinger structure using a nonlinear derivative operator which depends on a parameter $q$. This operator recovers Newton derivative when $q \rightarrow 1$. Using this operator we propose a deformed…

Pattern Formation and Solitons · Physics 2026-02-13 M. A. Rego-Monteiro , E. M. F. Curado

In this work, new closed-form formulas for the matrix exponential are provided. Our method is direct and elementary, it gives tractable and manageable formulas not current in the extensive literature on this essential subject. Moreover,…

Rings and Algebras · Mathematics 2021-08-17 Mohammed Mouçouf , Said Zriaa

Here we consider resonances of the Gauge, Gravity and Spinor fields in Randall-Sundrum-like scenarios. We consider membranes that are generated by a class of topological defects that are deformed domain walls obtained from other previously…

High Energy Physics - Theory · Physics 2015-05-30 R. R. Landim , G. Alencar , M. O. Tahim , R. N. Costa Filho

We systematically classify all supersymmetry-preserving mass deformations of SYM matrix models in all dimensions (D = 3, 4, 6, 10). In D = 10, the polarized IKKT model emerges as the only possible deformation. In D = 4, we identify two…

High Energy Physics - Theory · Physics 2026-01-29 Adrien Martina

Second gradient theories have to be used to capture how local micro heterogeneities macroscopically affect the behavior of a continuum. In this paper a configurational space for a solid matrix filled by an unknown amount of fluid is…

Mathematical Physics · Physics 2010-07-15 Giulio Sciarra , Francesco dell'Isola , Nicoletta Ianiro , Angela Madeo

We present the gauged N=4 (half-maximal) supergravities in four and five spacetime dimensions coupled to an arbitrary number of vector multiplets. The gaugings are parameterized by a set of appropriately constrained constant tensors, which…

High Energy Physics - Theory · Physics 2008-12-13 Jonas Schon , Martin Weidner