Results 11 to 20 of about 3,908,270 (279)

Metric field as emergence of Hilbert space [PDF]

Scientific Reports
First, we explain some ambiguities of spacetime and metric field as fundamental concepts. Then, from the Unruh effect point of view and using the Gelfand–Naimark–Segal construction, we construct an operator as a quanta of acceleration that we call ...
Maysam Yousefian, Mehrdad Farhoudi
doaj   +2 more sources

Consistent Treatment of Quantum Systems with a Time-Dependent Hilbert Space [PDF]

Entropy
We consider some basic problems associated with quantum mechanics of systems having a time-dependent Hilbert space. We provide a consistent treatment of these systems and address the possibility of describing them in terms of a time-independent Hilbert ...
Ali Mostafazadeh
doaj   +2 more sources

Vector inequalities for powers of some operators in Hilbert spaces [PDF]

, 2008
Vector inequalities for powers of some operators in Hilbert spaces with applications for operator norm, numerical radius, commutators and self-commutators are ...
Dragomir, Sever S, S.S. Dragomir
core   +7 more sources

Introduction of Frame in Tensor Product of $n$-Hilbert Spaces [PDF]

Sahand Communications in Mathematical Analysis, 2021
We study the concept of frame in tensor product of  $n$-Hilbert spaces as tensor product of  $n$-Hilbert spaces is again an  $n$-Hilbert space. We generalize some of the known results about bases to frames in this new Hilbert space.
Prasenjit Ghosh, Tapas Samanta
doaj   +1 more source

Some Inequalities for Commutators of Bounded Linear Operators in Hilbert Spaces [PDF]

, 2008
Some new inequalities for commutators that complement and in some instances improve recent results obtained by F. Kittaneh in 'Inequalities for commutators of positive operators' (2007) and 'Norm inequalities for commutators of Hilbert space operators ...
Dragomir, Sever S
core   +6 more sources

Ternary structures in Hilbert spaces [PDF]

, 2011
PhDTernary structures in Hilbert spaces arose in the study of in nite dimensional manifolds in di erential geometry. In this thesis, we develop a structure theory of Hilbert ternary algebras and Jordan Hilbert triples which are Hilbert spaces equipped
Bahmani, Fatemeh
core   +4 more sources

Developing the Third Order Linear and Nonlinear Fuzzy Ordinary Differential Equations in Hilbert Space by the Extension Principle

UMYU Scientifica Journal, 2023
In this study, a third nonlinear fuzzy ordinary differential equation is defined and established in Hilbert space using extension principle. The results obtained gives clear distinction between this work and the existing ones in the literature an ...
Habibu Hassan, Alhaji Tahir
doaj   +1 more source

W-Hilbert: A W-shaped Hilbert curve and coding method for multiscale geospatial data index

International Journal of Applied Earth Observations and Geoinformation, 2023
Space-filling curves (SFCs) are commonly used in discrete global grid systems (DGGSs) and applied to efficient indices and queries of massive geospatial data.
Yi Lei, Xiaochong Tong, Dali Wang, Chunping Qiu, He Li, Youwei Zhang   +5 more
doaj   +1 more source

Generalized Cauchy–Schwarz Inequalities and A-Numerical Radius Applications

Axioms, 2023
The purpose of this research paper is to introduce new Cauchy–Schwarz inequalities that are valid in semi-Hilbert spaces, which are generalizations of Hilbert spaces.
Najla Altwaijry, Kais Feki, Shigeru Furuichi   +2 more
doaj   +1 more source

Rigged Hilbert spaces and contractive families of Hilbert spaces [PDF]

Monatshefte für Mathematik, 2010
15 pages.
BELLOMONTE, Giorgia, TRAPANI, Camillo
openaire   +3 more sources