Results 81 to 90 of about 579,350 (178)
Surrogate Quantum Circuit Design for the Lattice Boltzmann Collision Operator
International Journal for Numerical Methods in Engineering, Volume 127, Issue 4, 28 February 2026.ABSTRACT This study introduces a framework for learning a low‐depth surrogate quantum circuit (SQC) that approximates the nonlinear, dissipative, and hence non‐unitary Bhatnagar–Gross–Krook (BGK) collision operator in the lattice Boltzmann method (LBM) for the D2Q9$$ {D}_2{Q}_9 $$ lattice.
Monica Lăcătuş, Matthias Möller
wiley +1 more source
On the perturbation bound in unitarily invariant norms for subunitary polar factors [PDF]
, 2008 Let Crm×n be the set of m×n complex matrices with rank r, and let A∈Crm×n and A∼=A+E∈Crm×n have the generalized polar decompositionsA=QHandA∼=Q∼H∼.In this article, a new perturbation bound for subunitary polar factors in any unitarily invariant norm is ...
Li, Wen
core +1 more source
The invariant rings of the Sylow groups of GU(3,q2), GU(4,q2), Sp(4,q) and O+(4,q) in the natural characteristic [PDF]
, 2016 Let G be a Sylow p -subgroup of the unitary groups GU(3,q2)GU(3,q2), GU(4,q2)GU(4,q2), the symplectic group Sp(4,q)Sp(4,q) and, for q odd, the orthogonal group O+(4,q)O+(4,q).
Fleischmann, Peter +2 more
core +1 more source
Interpolated inequalities for unitarily invariant norms
Linear Algebra and its Applications, 2015 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
openaire +2 more sources
The stability of the unit balls of symmetric and unitarily invariant norms [PDF]
, 1997 A compact convex set K is called stable if the midpoint mapping, K × K → K, (x, y) → (x + y)2, is open. The main result asserts that the stability of the closed unit ball of a unitarily invariant norm is equivalent to the stability of the closed unit ...
de Sá, Eduardo Marques
core +1 more source
Some operator inequalities for unitarily invariant norms [PDF]
, 2005 Let L(H) be the algebra of bounded operators on a complex separable Hilbert space H. Let N be a unitarily invariant norm defined on a norm ideal J ⊆ L(H). Given two positive invertible operators P,Q ∊ L(H) and k ∊ (−2, 2], we show that N (PTQ−1 + P−1TQ +
Mosconi, Irene +2 more
core
Normal operators and inequalities in norm ideals [PDF]
, 2009 In this work we characterize normal invertible operators via inequalities with unitarily invariant norm of elementary ...
Conde, Cristian Marcelo, Conde, Cristian
core +1 more source
A noncommutative Beurling theorem with respect to unitarily invariant norms
Journal of Operator Theory, 2016 25 ...
Chen, Yanni, Hadwin, Don, Shen, Junhao
openaire +2 more sources
Norm closed invariant subspaces in H∞ and L∞ [PDF]
, 2004 We characterize norm closed subspaces B of L∞(∂D) such that C(∂D)B ⊂ B, and maximal ones in the family of proper closed subspaces B of L∞(∂D) such that A(D)B ⊂ B, where A(D) is the disk algebra.
Suarez, Fernando Daniel, IzuchiI, Keiji
core +1 more source
The convex analysis of unitarily invariant matrix functions
, 1995 A fundamental result of von Neumann's identies unitarily invariant matrix norms as symmetric gauge functions of the singular values. Identifying the subdierential of such a norm is important in matrix approximation algorithms, and in studying the ...
A. S. Lewis
core