Results 81 to 90 of about 123,101 (223)

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

w 1+∞ and Carrollian holography

Journal of High Energy Physics
In a 1 + 2D Carrollian conformal field theory, the Ward identities of the two local fields S 0 + $$ {S}_0^{+} $$ and S 1 + $$ {S}_1^{+} $$ , entirely built out of the Carrollian conformal stress-tensor, contain respectively up to the leading and the ...
Amartya Saha
doaj   +1 more source

Some commutativity theorems in factor rings

The article is devoted to the general theory of associative rings, continuing a series of studies on the commutativity of quotient rings by primary and semi-primary ideal.
Gurninder S. Sandhu
core   +1 more source

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

Culture and Commutativity [PDF]

, 2022
The extent to which people can infer new mathematical concepts in the absence of cultural support is not clear. We test such learning with a simple math concept: additive commutativity.
Piantadosi, Steven, Boni, Isabelle
core  

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

Commutativity of associative rings through a Streb's classification [PDF]

, 1997
summary:Let $m \geq 0, ~r \geq 0, ~s \geq 0, ~q \geq 0$ be fixed integers. Suppose that $R$ is an associative ring with unity $1$ in which for each $x,y \in R$ there exist polynomials $f(X) \in X^{2} \mbox{$Z \hspace{-2.2mm} Z$}[X], ~g(X), ~h(X) \in X ...
Ashraf, Mohammad
core   +1 more source

Convergence and combinatorics of the Reverse algorithm

Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.
Abstract We study the Reverse algorithm, a multidimensional continued fraction algorithm, which is not unimodular. We show that the Reverse algorithm is ergodic and, by proving that its second Lyapunov exponent is negative, that it is a.e. exponentially convergent.
Hiroaki Ito, Niels Langeveld, Jörg Thuswaldner   +2 more
wiley   +1 more source

Common fixed point theorems for maps under a contractive condition of integral type [PDF]

, 2008
Two common fixed point theorems for mapping of complete metric space under a general contractive inequality of integral type and satisfying minimal commutativity conditions are proved.
Djoudi, A., Merghadi, F.
core   +1 more source

On the chain of commuting operators on Banach spaces

Bulletin of the London Mathematical Society, Volume 58, Issue 9, September 2026.
Abstract An operator T$T$ on a Banach space is said to be of chain N$N$ if there exist non‐scalar operators S1,⋯,SN−1$S_1,\dots,S_{N-1}$ and a non‐zero compact operator K$K$ such that T↔S1↔S2↔⋯↔SN−1↔K,$$\begin{equation*} T \leftrightarrow S_1 \leftrightarrow S_2 \leftrightarrow \dots \leftrightarrow S_{N-1} \leftrightarrow K, \end{equation*}$$where A↔B$
Tomasz Szczepanski
wiley   +1 more source