Results 101 to 110 of about 97,313 (257)

On -extensions of commutative rings

Journal of Pure and Applied Algebra, 1991
AbstractWe study Zp-extensions of a commutative ring R. Some general properties corresponding to the finite Galois theory by Chase, Harrison and Rosenberg are proved. After that, we consider Zp-extensions of commutative rings of characteristic p. We describe the structure of a Zp-extension and the Zp-module T(Zp, R) of the isomorphism classes of Zp ...
Antonio Paques, Andrzej Solecki, Miguel Ferrero   +2 more
openaire   +2 more sources

Coloured shuffle compatibility, Hadamard products, and ask zeta functions

Bulletin of the London Mathematical Society, EarlyView.
Abstract We devise an explicit method for computing combinatorial formulae for Hadamard products of certain rational generating functions. The latter arise naturally when studying so‐called ask zeta functions of direct sums of modules of matrices or class‐ and orbit‐counting zeta functions of direct products of nilpotent groups.
Angela Carnevale, Vassilis Dionyssis Moustakas, Tobias Rossmann   +2 more
wiley   +1 more source

Étale motives of geometric origin

Bulletin of the London Mathematical Society, EarlyView.
Abstract Over qcqs finite‐dimensional schemes, we prove that étale motives of geometric origin can be characterised by a constructibility property which is purely categorical, giving a full answer to the question ‘Do all constructible étale motives come from geometry?’ which dates back to Cisinski and Déglise's work.
Raphaël Ruimy, Swann Tubach
wiley   +1 more source

VIC-modules over noncommutative rings

, 2020
For a finite ring $R$, not necessarily commutative, we prove that the category of $\text{VIC}(R)$-modules over a left Noetherian ring $\mathbf{k}$ is locally Noetherian, generalizing a theorem of the authors that dealt with commutative $R$.
Putman, Andrew, Sam, Steven V
core  

Diagonalisasi matriks atas ring dengan metode pemfaktoran secara lengkap

Majalah Ilmiah Matematika dan Statistika
Generally, discussion about diagonalization of matrices in linear algebra is a matrix over the field. This research presents the diagonalization of matrices over commutative rings.
Nikita Nikita, Ari Suparwanto, Sutopo Sutopo   +2 more
doaj   +1 more source

Presentation of kernels of rational characters of right‐angled Artin groups

Bulletin of the London Mathematical Society, EarlyView.
Abstract In this note, we characterise when the kernel of a rational character of a right‐angled Artin group, also known as generalised Bestiva–Brady group, is finitely generated and finitely presented. In these cases, we exhibit a finite generating set and a presentation.
Montserrat Casals‐Ruiz, Ilya Kazachkov, Mallika Roy   +2 more
wiley   +1 more source

Noncrossed Product Matrix Subrings and Ideals of Graded Rings

, 2009
We show that if a groupoid graded ring has a certain nonzero ideal property and the principal component of the ring is commutative, then the intersection of a nonzero twosided ideal of the ring with the commutant of the principal component of the ring is
Lundström, Patrik, Öinert, Johan
core  

Nontautological cycles on moduli spaces of smooth pointed curves

Bulletin of the London Mathematical Society, EarlyView.
Abstract In recent work by Arena, Canning, Clader, Haburcak, Li, Mok, and Tamborini, it was proven that for infinitely many values of g$g$ and n$n$, there exist nontautological algebraic cohomology classes on the moduli space Mg,n$\mathcal {M}_{g,n}$ of smooth genus g$g$, n$n$‐pointed curves.
Dario Faro, Carolina Tamborini
wiley   +1 more source

Exponential actions defined by vector configurations, Gale duality, and moment‐angle manifolds

Bulletin of the London Mathematical Society, EarlyView.
Abstract Exponential actions defined by vector configurations provide a universal framework for several constructions of holomorphic dynamics, non‐Kähler complex geometry, toric geometry and topology. These include leaf spaces of holomorphic foliations, intersections of real and Hermitian quadrics, the quotient construction of simplicial toric ...
Taras Panov
wiley   +1 more source

On the universal pairing for 2‐complexes

Bulletin of the London Mathematical Society, EarlyView.
Abstract The universal pairing for manifolds was defined and shown to lack positivity in dimension 4 in [Freedman, Kitaev, Nayak, Slingerland, Walker, and Wang, J. Geom. Topol. 9 (2005), 2303–2317]. We prove an analogous result for 2‐complexes, and show that the universal pairing does not detect the difference between simple homotopy equivalence and 3 ...
Mikhail Khovanov, Vyacheslav Krushkal, John Nicholson   +2 more
wiley   +1 more source