Results 141 to 150 of about 1,450,468 (275)

Amenability Constants for Unconditional Sums of Banach Algebras

Mathematische Nachrichten, Volume 299, Issue 9, Page 2472-2494, September 2026.
ABSTRACT We study Johnson amenability for unconditional direct sums of Banach algebras. Given a family (Ai)i∈I$(A_i)_{i\in I}$ of Banach algebras and a Banach sequence lattice E$E$ on I$I$, the E$E$‐sum ⨁i∈IAiE${\bigl (\bigoplus _{i\in I} A_i\bigr)}_{\!E}$ carries a natural Banach algebra structure via coordinatewise multiplication.
Tomasz Kania, Jerzy Ka̧kol
wiley   +1 more source

On the comaximal graph of a ring

AKCE International Journal of Graphs and Combinatorics
In this paper, we prove that the study of the comaximal graph of a finite commutative ring with identity is the same as the study of the zero-divisor graph of the specially constructed lattice.
Pravin Gadge, Nilesh Khandekar, Vinayak Joshi   +2 more
doaj   +1 more source

Model Predictive Control of Gas Networks Based on Port‐Hamiltonian Formulations

Proceedings in Applied Mathematics and Mechanics, Volume 26, Issue 3, September 2026.
ABSTRACT To efficiently compute optimal compressor actions in gas networks, we investigate port‐Hamiltonian models consisting of linear and a nonlinear model assumptions. The control actions are derived via adjoint‐based gradients that incorporate the constraints of the underlying optimization problem. We then present results from the implementation of
Andres Ortegón‐Villacorte, Jan Rohleff   +1 more
wiley   +1 more source

Commutative Periodic Semigroups With the Ideal Retraction Property

, 2002
This paper presents a complete characterization of commutative periodic semigroups with the ideal retraction ...
J. A. Hildebrant, J. A. Dumesnil, K. D. Aucoin, Communicated J. D. Lawson   +3 more
core  

Compile‐Once Block Encodings for Masked Similarity‐Transformed Effective Hamiltonians

Advanced Quantum Technologies, Volume 9, Issue 9, September 2026.
Composer transforms structured electronic‐structure operators into a reusable quantum‐circuit fabric. Once compiled, the same block‐encoding architecture is re‐dialed through coefficients, rotation angles, and masks to generate similarity‐transformed effective Hamiltonians across related problem instances, avoiding repeated structural recompilation ...
Bo Peng, Yuan Liu, Karol Kowalski
wiley   +1 more source

On Commutative SCI-Rings and Commutative SCS-Rings

, 2010
. Let R be a commutative ring. An unital R-module M is said to have property (I) (resp. property (S)) if every injective (resp. surjective) endomorphism of M is an automorphism. The ring R is called commutative SCI-ring (resp. SCS-ring) if every R-module
Touré, Mamadou Sangharé, Sidy Demba, Abdoulaye Mbaye   +3 more
core  

Aggregation and the Structure of Value

Noûs, Volume 60, Issue 3, Page 619-644, September 2026.
ABSTRACT Roughly, the view I call “Additivism” sums up value across time and people. Given some standard assumptions, I show that Additivism follows from two principles. The first says that how lives align in time cannot, in itself, matter. The second says, roughly, that a world cannot be better unless it is better within some period or another.
Weng Kin San
wiley   +1 more source

Sharp Upper Bound for Amplitudes of Finite‐Gap Solutions of the Modified Korteweg‐de Vries Equation

Studies in Applied Mathematics, Volume 157, Issue 3, September 2026.
ABSTRACT A sharp upper bound is established for the amplitudes of finite‐gap solutions of the focusing modified Korteweg–de Vries equation. The proof shows that the optimization can be carried out entirely within the finite‐dimensional hierarchy, without explicit integration of the finite‐gap solution. The maximal amplitude is expressed in terms of the
Otis C. Wright III
wiley   +1 more source

On Exponentially Long Prethermalization Timescales in Isolated Quantum Systems

Studies in Applied Mathematics, Volume 157, Issue 3, September 2026.
ABSTRACT We study prethermalization in time‐independent quantum many‐body systems on a d$d$‐dimensional lattice with an extensive local Hamiltonian H=N+εP$H=N+\varepsilon P$, in the regime where ε≪1$\varepsilon \ll 1$. We prove that the prethermal timescale is exponential in ε0/ε$\varepsilon _0/\varepsilon$, where ε0$\varepsilon _0$ is an explicit ...
Matteo Gallone
wiley   +1 more source

ON (L,M)-FUZZY TOPOGENOUS SPACES

Journal of New Theory, 2015
In this paper, we introduce the concept of an (L, M )-fuzzy topogenous space, whereL, M are strictly two sided commutative quantales lattices. Basic properties of (L, M )-fuzzy topogenous spaces are studied, (L, M )-fuzzy topological spaces, (L, M ...
Ahmed Abdel-kader Ramadan, Enas Hassan El-kordy   +1 more
doaj