Results 1 to 10 of about 5,084 (165)

INVARIANT SUBSPACES IN UNBOUNDED DOMAINS

Проблемы анализа, 2021
We study subspaces of functions analytic in an unbounded convex domain of the complex plane and invariant with respect to the differentiation operator.
A. S. Krivosheev, O. A. Krivosheeva
doaj   +2 more sources

The Invariant Subspace Problem for Separable Hilbert Spaces

Axioms
In this paper, we prove that every bounded linear operator on a separable Hilbert space has a non-trivial invariant subspace. This answers the well-known invariant subspace problem.
Waseem Ghazi Alshanti, Abdelrahman Yousef, Roshdi Khalil   +2 more
exaly   +3 more sources

Subspace-Invariant AC$^0$ Formulas [PDF]

Logical Methods in Computer Science, 2019
We consider the action of a linear subspace $U$ of $\{0,1\}^n$ on the set of AC$^0$ formulas with inputs labeled by literals in the set $\{X_1,\overline X_1,\dots,X_n,\overline X_n\}$, where an element $u \in U$ acts on formulas by transposing the $i$th ...
Benjamin Rossman
doaj   +1 more source

Optimizing option pricing: Exact and approximate solutions for the time-fractional Ivancevic model

Alexandria Engineering Journal, 2023
This research investigates the time fractional Ivancevic option pricing model and presents two distinct solution methods: the invariant subspace method for obtaining exact solutions and the residual power series method for generating approximate ...
Khalid K. Ali, M.A. Maaty, M. Maneea
doaj   +1 more source

Hidden symmetries and large N factorisation for permutation invariant matrix observables

Journal of High Energy Physics, 2022
Permutation invariant polynomial functions of matrices have previously been studied as the observables in matrix models invariant under S N , the symmetric group of all permutations of N objects.
George Barnes, Adrian Padellaro, Sanjaye Ramgoolam   +2 more
doaj   +1 more source

Speed invariant gait recognition-The enhanced mutual subspace method.

PLoS ONE, 2021
This paper introduces an enhanced MSM (Mutual Subspace Method) methodology for gait recognition, to provide robustness to variations in walking speed.
Yumi Iwashita, Hitoshi Sakano, Ryo Kurazume, Adrian Stoica   +3 more
doaj   +2 more sources

The invariant subspace method for solving nonlinear fractional partial differential equations with generalized fractional derivatives

Advances in Difference Equations, 2020
In this paper, we show that the invariant subspace method can be successfully utilized to get exact solutions for nonlinear fractional partial differential equations with generalized fractional derivatives. Using the invariant subspace method, some exact
Mohamed S. Abdel Latif, Abass H. Abdel Kader, Dumitru Baleanu   +2 more
doaj   +1 more source

Isometries of ∗ -Invariant Subspaces [PDF]

Transactions of the American Mathematical Society, 1974
We consider families of increasing ∗
openaire   +2 more sources

INVARIANT SUBSPACES IN THE BIDISC AND WANDERING SUBSPACES [PDF]

Journal of the Australian Mathematical Society, 2008
Abstract Let M be a forward-shift-invariant subspace and N a backward-shift-invariant subspace in the Hardy space H2 on the bidisc. We assume that $H^2=N \oplus M$ . Using the wandering subspace of M and N, we study the relations between M and N. Moreover we study M and N using several natural operators defined by shift operators on H2.
openaire   +3 more sources

Invariant Subspaces, Quasi-invariant Subspaces, and Hankel Operators

Journal of Functional Analysis, 2001
The authors study algebraic properties of small Hankel operators on Bergman spaces of bounded symmetric domains \(\Omega\subset \mathbb{C}^n\). Here, the Bergman space \(L^2_a(\Omega)\) is the closed subspace of \(L^2(\Omega)\) consisting of analytic functions and the small Hankel operator \(\Gamma_\varphi\) with symbol \(\varphi\in L^2(\Omega)\) is ...
Guo, Kunyu, Zheng, Dechao
openaire   +2 more sources