Results 21 to 30 of about 4,647,140 (179)

The Spectral Scale of a Self-Adjoint Operator in a Semifinite von Neumann Algebra

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2011
We extend Akemann, Anderson, and Weaver's Spectral Scale definition to include selfadjoint operators from semifinite von Neumann algebras. New illustrations of spectral scales in both the finite and semifinite von Neumann settings are presented.
Christopher M. Pavone
doaj   +1 more source

$G$-amenability for Direct Sum, Tensor Product and Free Product of von-Neumann Algebras [PDF]

open access: yesریاضی و جامعه
For a family of $W^*$-dynamical systems $(M_i, G, \alpha_i)_{i\in I}$, where $G$ is a locally compact group, we prove that if the direct sum $\bigoplus_{i \in I} M_i$ is $G$-amenable, then each $M_i$ is also $G$-amenable.Conversely, if all $M_i$'s form a
Mohammad Reza Ghanei
doaj   +1 more source

Categorical characterizations of operator-valued measures [PDF]

open access: yesElectronic Proceedings in Theoretical Computer Science, 2014
The most general type of measurement in quantum physics is modeled by a positive operator-valued measure (POVM). Mathematically, a POVM is a generalization of a measure, whose values are not real numbers, but positive operators on a Hilbert space.
Frank Roumen
doaj   +1 more source

Arens Algebras and Matricial Spaces

open access: yesВестник КазНУ. Серия математика, механика, информатика, 2019
Let M be a finite von Neumann algebra equipped with a finite faithful normal trace and let Lp(M; ) be the corresponding noncommutative Lp space of -measurable operators associated with the couple (M; ), 1 ≤ p < ∞. Let MN be the algebra of all complex N
Denis Potapov, Fedor Sukochev
doaj   +1 more source

The Amalgamated Free Product of Hyperfinite von Neumann Algebras [PDF]

open access: yes, 2012
We examine the amalgamated free product of hyperfinite von Neumann algebras. First we describe the amalgamated free product of hyperfinite von Neumann algebras over finite dimensional subalgebras.
Redelmeier, Daniel
core   +3 more sources

Nonlinear Dynamics and Invariants of Motion in ReRAM Cells

open access: yesAdvanced Electronic Materials, EarlyView.
A second‐order cell, hosting one capacitor and two back‐to‐back ReRAMs, admits Invariants of Motion: its states lie on one‐dimensional manifolds at all times. The cell shows quiescent monostability or bistability, depending on the manifold index. At equilibrium, the capacitor voltage vanishes.
Mauro Di Marco   +5 more
wiley   +1 more source

W* algebras as a complete axiomatization of Von-Neumann algebras [PDF]

open access: yes, 2019
Der Author beweist in dieser ausgesprochen tief liegenden Diplomarbeit die Charakterisierung von S. Sakai von Von-Neumann-Algebren A durch die Eigenschaft, dass A neben seiner Struktur als C*-Algebra noch Dualraum eines Banachraumes ist.The author proves
Schindler, Clemens; orcid:
core   +1 more source

Ultraproduct embeddings and amenability for tracial von Neumann algebras

open access: yes, 2020
The separably acting hyperfinite/amenable II$_1$-factor $R$ has the property that any two embeddings into its own ultrapower are unitarily conjugate. Jung showed in 2009 that the converse holds modulo the Connes Embedding Problem.
Atkinson, Scott
core   +1 more source

Artificial Intelligence for Advanced Functional Materials: Progress and Emerging Frontiers

open access: yesAdvanced Intelligent Systems, EarlyView.
Artificial intelligence is transforming the discovery of functional materials by linking synthesis, characterization, simulation, and design in unified workflows. Advances in machine learning, autonomous experimentation, and foundation models are accelerating innovation across energy, electronics, and biomedicine, while revealing new frontiers for ...
Cristiano Malica   +38 more
wiley   +1 more source

Asymptotic freeness in tracial ultraproducts

open access: yesForum of Mathematics, Sigma
We prove novel asymptotic freeness results in tracial ultraproduct von Neumann algebras. In particular, we show that whenever $M = M_1 \ast M_2$ is a tracial free product von Neumann algebra and $u_1 \in \mathscr U(M_1)$ , $u_2 \in ...
Cyril Houdayer, Adrian Ioana
doaj   +1 more source

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