
arXiv: 2212.14512
ABSTRACTMatrix‐valued Cauchy bi‐orthogonal polynomials are proposed in this paper, together with its quasideterminant expression. It is shown that the coefficients in the four‐term recurrence relation for matrix‐valued Cauchy bi‐orthogonal polynomials satisfy a novel noncommutative integrable system, whose Lax pair is given by fractional differential operators with non‐abelian variables.
matrix-valued Cauchy bi-orthogonal polynomials, noncommutative Toda lattice, Integrable difference and lattice equations; integrability tests, Nonlinear Sciences - Exactly Solvable and Integrable Systems, direct method, FOS: Physical sciences, Mathematical Physics (math-ph), Orthogonal polynomials and functions of hypergeometric type (Jacobi, Laguerre, Hermite, Askey scheme, etc.), Relations of infinite-dimensional Hamiltonian and Lagrangian dynamical systems with algebraic geometry, complex analysis, and special functions, Relations of infinite-dimensional Hamiltonian and Lagrangian dynamical systems with infinite-dimensional Lie algebras and other algebraic structures, Lattice dynamics; integrable lattice equations, quasideterminants, Exactly Solvable and Integrable Systems (nlin.SI), Mathematical Physics
matrix-valued Cauchy bi-orthogonal polynomials, noncommutative Toda lattice, Integrable difference and lattice equations; integrability tests, Nonlinear Sciences - Exactly Solvable and Integrable Systems, direct method, FOS: Physical sciences, Mathematical Physics (math-ph), Orthogonal polynomials and functions of hypergeometric type (Jacobi, Laguerre, Hermite, Askey scheme, etc.), Relations of infinite-dimensional Hamiltonian and Lagrangian dynamical systems with algebraic geometry, complex analysis, and special functions, Relations of infinite-dimensional Hamiltonian and Lagrangian dynamical systems with infinite-dimensional Lie algebras and other algebraic structures, Lattice dynamics; integrable lattice equations, quasideterminants, Exactly Solvable and Integrable Systems (nlin.SI), Mathematical Physics
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