Results 41 to 50 of about 58,620 (315)

Modeling Sampling in Tensor Products of Unitary Invariant Subspaces

open access: yesJournal of Function Spaces, 2016
The use of unitary invariant subspaces of a Hilbert space H is nowadays a recognized fact in the treatment of sampling problems. Indeed, shift-invariant subspaces of L2(R) and also periodic extensions of finite signals are remarkable examples where this ...
Antonio G. García   +2 more
doaj   +1 more source

Stability of invariant manifold of nonlinear system of differential equations

open access: yesНауковий вісник Ужгородського університету. Серія: Математика і інформатика, 2019
The theory of extensions of the dynamical equations on the torus is an important section of the theory of ordinary differential equations that is intensively evolving and has an important applied application to various tasks of science and technology ...
С. І. Балога
doaj   +1 more source

Towards an axiomatic formulation of noncommutative quantum field theory. II

open access: yesNuclear Physics B, 2020
Classical results of the axiomatic quantum field theory – irreducibility of the set of field operators, Reeh and Schlieder's theorems and generalized Haag's theorem are proven in SO(1,1) invariant quantum field theory, of which an important example is ...
M. Chaichian   +2 more
doaj   +1 more source

Wilson lines and boundary operators of BCFW shifts

open access: yesJournal of High Energy Physics, 2022
Boundary operators are gauge invariant operators whose form factors correspond to boundary contributions of BCFW shifts. In gauge theory, the boundary operators contain infinite series, which are constrained by gauge symmetry.
Rijun Huang, Qingjun Jin, Yi Li
doaj   +1 more source

Mechanisms of IgE‐mediated food allergy and the role of allergen‐specific B cells

open access: yesFEBS Letters, EarlyView.
Food allergy arises when allergen‐specific B cells preferentially produce immunoglobulin E (IgE) antibodies against harmless foods. This article explains the mechanisms driving IgE‐mediated reactions, highlights the central role of these B cells, and discusses how natural tolerance (NT) and oral immunotherapy (OIT) can reshape allergic immune responses.
Juan‐Felipe López   +2 more
wiley   +1 more source

3D geometric moment invariants from the point of view of the classical invariant theory

open access: yesМатематичні Студії, 2023
The aim of this paper is to clear up the problem of the connection between the 3D geometric moments invariants and the invariant theory, considering a problem of describing of the 3D geometric moments invariants as a problem of the classical invariant ...
L. P. Bedratyuk, A. I. Bedratyuk
doaj   +1 more source

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

open access: yesFEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Transcending classical invariant theory [PDF]

open access: yesJournal of the American Mathematical Society, 1989
Let \(\tilde Sp\) denote the twofold cover of the real symplectic group \(Sp_{2n}({\mathbb{R}})=Sp\). The theory of \(\theta\)-series as developed by Siegel is ruled by a certain representation \(\omega\) of \(\tilde Sp\), the so called oscillator representation first constructed by Shale and Weil.
openaire   +2 more sources

Invariant Theory for the free left-regular band and a q-analogue [PDF]

open access: green, 2022
Sarah Brauner   +2 more
openalex   +1 more source

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

open access: yesFEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel   +13 more
wiley   +1 more source

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