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Let G be a Lie group and g its Lie algebra. We develop a theory of quasi Poisson structures relative to a not necessarily non-degenerate Ad-invariant symmetric 2-tensor in the tensor square of g and one of general not necessarily…

Differential Geometry · Mathematics 2026-01-22 Johannes Huebschmann

In this paper we continue our analysis of the stationary flows of $M$ component, coupled KdV (cKdV) hierarchies and their modifications. We describe the general structure of the $t_1$ and $t_2$ flows, using the case $M=3$ as our main…

Exactly Solvable and Integrable Systems · Physics 2023-07-10 Allan P. Fordy , Qing Huang

A generalized Kummer surface $X=Km_{3}(A,G_{A})$ is the minimal resolution of the quotient of a $2$-dimensional complex torus by an order 3 symplectic automorphism group $G_{A}$. A Kummer structure on $X$ is an isomorphism class of pairs…

Algebraic Geometry · Mathematics 2023-10-13 Xavier Roulleau

In this paper, we study and describe the universal Poisson deformation space of hypertoric varieties concretely. In the first application, we show that affine hypertoric varieties as conical symplectic varieties are classified by the…

Algebraic Geometry · Mathematics 2021-10-13 Takahiro Nagaoka

We consider a curved space-time whose algebra of functions is the commutative limit of a noncommutative algebra and which has therefore an induced Poisson structure. In a simple example we determine a relation between this structure and the…

General Relativity and Quantum Cosmology · Physics 2015-06-25 J. Madore

K\"ahler-Poisson algebras were introduced as algebraic analogues of function algebras on K\"ahler manifolds, and it turns out that one can develop geometry for these algebras in a purely algebraic way. A K\"ahler-Poisson algebra consists of…

Rings and Algebras · Mathematics 2019-12-17 Ahmed Al-Shujary

In this paper, generalizing the construction of \cite{HP1}, we equip the relative moduli stack of complexes over a Calabi-Yau fibration (possibly with singular fibers) with a shifted Poisson structure. Applying this construction to the…

Algebraic Geometry · Mathematics 2023-11-06 Zheng Hua , Alexander Polishchuk

We describe two new combinatorial algorithms (using the language of "triangular arrays") for computing the Fourier transforms of simple perverse sheaves on the moduli space of representations of an equioriented quiver of type A. (A rather…

Representation Theory · Mathematics 2018-07-27 Pramod N. Achar , Maitreyee C. Kulkarni , Jacob P. Matherne

In this paper, we consider Hamiltonian structures of hydrodynamic type and some of their generalizations. In particular, we discuss the questions concerning the structure and special forms of the corresponding Poisson brackets and the…

Mathematical Physics · Physics 2021-06-16 A. Ya. Maltsev , S. P. Novikov

We examine the Hamiltonian structures of some Calogero-Moser and Ruijsenaars-Schneider N-body integrable models. We propose explicit formulations of the bihamiltonian structures for the discrete models, and field-theoretical realizations of…

Exactly Solvable and Integrable Systems · Physics 2014-11-20 Inês Aniceto , Jean Avan , Antal Jevicki

We provide a quiver description for Cherkis bow varieties in arbitrary type. We explain how this generalizes the construction of Nakajima quiver varieties. We give criteria for stability, non-emptiness, smoothness and discuss deformations.…

Representation Theory · Mathematics 2025-09-03 Tiziano Gaibisso

Fundamental representations of real simple Poisson Lie groups are Poisson actions with a suitable choice of the Poisson structure on the underlying (real) vector space. We study these (mostly quadratic) Poisson structures and corresponding…

q-alg · Mathematics 2009-10-28 S. Zakrzewski

Several new mutation-periodic quivers of period higher than 1 are introduced as well as the associated discrete dynamical systems. The reduction of these systems is developed using either a presymplectic or a Poisson approach. The…

Dynamical Systems · Mathematics 2014-02-10 Inês Cruz , M. Esmeralda Sousa-Dias

In this short survey, we describe our approach for constructing hierarchies of Poisson brackets for classical integrable systems using its' spectral curves.

Mathematical Physics · Physics 2018-05-24 K. L. Vaninsky

We explicitly construct the Kummer variety associated to the Jacobian of a hyperelliptic curve of genus 3 that is defined over a field of characteristic not equal to 2 and has a Weierstra{\ss} point defined over the same field. We also…

Algebraic Geometry · Mathematics 2019-02-20 J. Steffen Müller

It was proposed the Lie group such that symplectic structure of orbits of co-adjoint representation of the group is revealed symplectic structure of a rigid body dynamics in quaternion variables. It is shown that Poisson brackets of…

Mathematical Physics · Physics 2015-08-18 Stanislav S. Zub , Sergiy I. Zub

We construct explicitly a class of coboundary Poisson-Lie structures on the group of formal diffeomorphisms of ${\Bbb R}^n$. Equivalently, these give rise to a class of coboundary triangular Lie bialgebra structures on the Lie algebra $W_n$…

Quantum Algebra · Mathematics 2007-05-23 Ognyan S. Stoyanov

We develop a Poisson geometric framework for studying the representation theory of all contragredient quantum super groups at roots of unity. This is done in a uniform fashion by treating the larger class of quantum doubles of bozonizations…

Quantum Algebra · Mathematics 2023-03-16 Nicolás Andruskiewitsch , Iván Angiono , Milen Yakimov

The main aim of this article is to characterize inner Poisson structure on a quantum cluster algebra without coefficients. Mainly, we prove that inner Poisson structure on a quantum cluster algebra without coefficients is always a standard…

Representation Theory · Mathematics 2020-08-13 Fang Li , Jie Pan

A new four-dimensional family of skew-symmetric solutions of the Jacobi equations for Poisson structures is characterized. As a consequence, previously known types of Poisson structures found in a diversity of physical situations appear to…

Mathematical Physics · Physics 2019-11-12 Benito Hernández-Bermejo
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