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We approach the problem of obtaining branching rules from the point of view of dual reductive pairs. Specifically, we obtain a stable branching rule for each of 10 classical families of symmetric pairs. In each case, the branching…

Representation Theory · Mathematics 2007-05-23 Roger E. Howe , Eng Chye Tan , Jeb F. Willenbring

Using the methods of Kang et al. and recent results on the characters of Kirillov-Reshetikhin modules by Nakajima and Hernandez, the existence of Kirillov-Reshetikhin crystals B^{r,s} is established for all nonexceptional affine types. We…

Quantum Algebra · Mathematics 2008-11-26 Masato Okado , Anne Schilling

This paper provides a combinatorial characterisation for generic forced symmetric rigidity of bar-joint frameworks in the Euclidean plane that are symmetric with respect to the orientation-reversing wallpaper group…

Combinatorics · Mathematics 2025-02-21 Jack Esson , Eleftherios Kastis , Bernd Schulze

Let G be a connected reductive algebraic group and H be a reductive closed and connected subgroup of G both defined on an algebraically closed field of characteristic zero. We consider the set C of the couple (x,y) of the dominant weights…

Representation Theory · Mathematics 2009-09-29 Pierre-Louis Montagard , Nicolas Ressayre

We consider three forms of composition of matroids, each of which extends the category of bimatroids to a rigid monoidal category. Many well-known constructions are functorial or defined by morphisms in these categories. Motivating examples…

Combinatorics · Mathematics 2024-03-07 Kevin Purbhoo

Using Lakshmibai-Seshadri paths, we give a combinatorial realization of the crystal basis of an extremal weight module of integral extremal weight over the quantized universal enveloping algebra associated to the infinite rank affine Lie…

Quantum Algebra · Mathematics 2010-03-15 Satoshi Naito , Daisuke Sagaki

We give a purely combinatorial proof of the positivity of the stabilized forms of the generalized exponents associated to each classical root system. In finite type A_{n-1}, we rederive the description of the generalized exponents in terms…

Representation Theory · Mathematics 2018-01-03 Cedric Lecouvey , Cristian Lenart

Consider Kashiwara's crystal associated to a highest weight representation of a symmetric Kac-Moody algebra. There is a geometric realization of this object using Nakajima's quiver varieties, but in many particular cases it can also be…

Combinatorics · Mathematics 2014-02-03 Steven V Sam , Peter Tingley

We present a Robinson-Schensted-Knuth type one-to-one correspondence between the set of pictures and the set of pairs of Littlewood-Richardson crystals.

Quantum Algebra · Mathematics 2010-06-01 Toshiki Nakashima , Miki Shimojo

Causal rigid particles whose action includes an {\it arbitrary} dependence on the world-line extrinsic curvature are considered. General classes of solutions are constructed, including {\it causal tachyonic} ones. The Hamiltonian…

High Energy Physics - Theory · Physics 2009-10-22 Jan Govaerts

We investigate stabilizer codes with carrier qudits of equal dimension $D$, an arbitrary integer greater than 1. We prove that there is a direct relation between the dimension of a qudit stabilizer code and the size of its corresponding…

Quantum Physics · Physics 2015-03-17 Vlad Gheorghiu

We study the singular stochastic optimal control problem with model uncertainty, where the necessary conditions determined by the corresponding maximum principle are trivial. Robust integral form and pointwise second order necessary…

Optimization and Control · Mathematics 2025-12-09 Guangdong Jing

We propose a unified framework for dealing with matching rules of quasiperiodic patterns, relevant for both tiling models and real world quasicrystals. The approach is intended for extraction and validation of a minimal set of matching…

Other Condensed Matter · Physics 2019-06-07 Pavel Kalugin , André Katz

We present a geometric construction of highest weight crystals for quantum generalized Kac-Moody algebras. It is given in terms of the irreducible components of certain Lagrangian subvarieties of Nakajima's quiver varieties associated to…

Quantum Algebra · Mathematics 2009-08-11 Seok-Jin Kang , Masaki Kashiwara , Olivier Schiffmann

We establish the equality of the specialization $P_\lambda(x;q,0)$ of the Macdonald polynomial at $t=0$ with the graded character $X_\lambda(x;q)$ of a tensor product of "single-column" Kirillov-Reshetikhin (KR) modules for untwisted affine…

Quantum Algebra · Mathematics 2017-07-31 Cristian Lenart , Satoshi Naito , Daisuke Sagaki , Anne Schilling , Mark Shimozono

We develop a general stability analysis for objective structures, which constitute a far reaching generalization of crystal lattice systems. We show that these particle systems, although in general neither periodic nor space filling, allow…

Analysis of PDEs · Mathematics 2025-03-12 Bernd Schmidt , Martin Steinbach

We construct and investigate the structure of the Khovanov-Lauda-Rouquier algebras $R$ and their cyclotomic quotients $R^\lambda$ which give a categrification of quantum generalized Kac-Moody algebras. Let $U_\A(\g)$ be the integral form of…

Representation Theory · Mathematics 2012-08-21 Seok-Jin Kang , Se-jin Oh , Euiyong Park

In this paper some sufficient conditions are given for when two bounded rank-one transformations are isomorphic or disjoint. For commensurate, canonically bounded rank-one transformations, isomorphism and disjointness are completely…

Dynamical Systems · Mathematics 2016-01-19 Su Gao , Aaron Hill

We describe a procedure, called regularisation, that allows us to study geometric structures on Lie algebroids via foliated geometric structures on a manifold of higher dimension. This procedure applies to various classes of Lie algebroids;…

Differential Geometry · Mathematics 2022-11-29 Álvaro del Pino , Aldo Witte

We construct infinite periodic versions of the stress matrix and establish sufficient conditions for periodic tensegrity frameworks to be globally rigid in $\mathbb{R}^d$ in the cases when the lattice is either fixed, fully flexible, or…

Metric Geometry · Mathematics 2025-10-23 Sean Dewar , Bernd Schulze , Shin-ichi Tanigawa , Louis Theran