Results 91 to 100 of about 1,334 (223)

Infinity‐operadic foundations for embedding calculus

Journal of Topology, Volume 19, Issue 2, June 2026.
Abstract Motivated by applications to spaces of embeddings and automorphisms of manifolds, we consider a tower of ∞$\infty$‐categories of truncated right modules over a unital ∞$\infty$‐operad O$\mathcal {O}$. We study monoidality and naturality properties of this tower, identify its layers, describe the difference between the towers as O$\mathcal {O}$
Manuel Krannich, Alexander Kupers
wiley   +1 more source

Thurston norm for coherent right‐angled Artin groups via L2$L^2$‐invariants

Journal of Topology, Volume 19, Issue 2, June 2026.
Abstract We define a new notion of splitting complexity for a group G$G$ along a non‐trivial integral character ϕ∈H1(G;Z)$\phi \in H^1(G; \mathbb {Z})$. If G$G$ is a one‐ended coherent right‐angled Artin group, we show that the splitting complexity along an epimorphism ϕ:G→Z$\phi \colon G \rightarrow \mathbb {Z}$ equals the L2$L^2$‐Euler characteristic
Monika Kudlinska
wiley   +1 more source

An Overview of Some New Classes of Abelian p-Groups [PDF]

Advances in Group Theory and Applications
This paper surveys results obtained in the last twelve years that gave origin to several new classes of abelian p-groups. These results have their source in the definition of the intrinsic algebraic entropy of the endomorphisms of p-groups, and are ...
Luigi Salce
doaj   +1 more source

On endomorphism and automorphisms of some torsion-free modules [PDF]

, 1987
The relationship between the endomorphism ring and the automorphism group of an abelian p-group has been extensively investigated. It is known that theautomorphism group need not generate the full endomorphism ring.
Goldsmith, Brendan
core   +2 more sources

A limit on the Loewy length of the endomorphism ring of a module of finite length [PDF]

, 1981
Let M M be a module of finite length over an arbitrary ring A A . Let S 1 , S 2 , …
Sverre O. Smalø
core   +1 more source

Computing supersingular endomorphism rings using inseparable endomorphisms

Journal of Algebra
We give an algorithm for computing an inseparable endomorphism of a supersingular elliptic curve $E$ defined over $\mathbb F_{p^2}$, which, conditional on GRH, runs in expected $O(p^{1/2}(\log p)^2(\log\log p)^3)$ bit operations and requires $O((\log p)^2)$ storage.
Fuselier, Jenny, Iezzi, Annamaria, Kozek, Mark, Morrison, Travis, Namoijam, Changningphaabi   +4 more
openaire   +6 more sources

Natural endomorphisms of Burnside rings [PDF]

Transactions of the American Mathematical Society, 1979
The Burnside ring B ( G )
openaire   +1 more source

Rational torsion points on abelian surfaces with quaternionic multiplication

Forum of Mathematics, Sigma
Let A be an abelian surface over ${\mathbb {Q}}$ whose geometric endomorphism ring is a maximal order in a non-split quaternion algebra. Inspired by Mazur’s theorem for elliptic curves, we show that the torsion subgroup of $A({\mathbb {Q}})$
Jef Laga, Ciaran Schembri, Ari Shnidman, John Voight   +3 more
doaj   +1 more source

The discrete logarithm problem in Bergman's non-representable ring

Journal of Mathematical Cryptology, 2012
Bergman's ring , parameterized by a prime number p, is a ring with p5 elements that cannot be embedded in a ring of matrices over any commutative ring. This ring was discovered in 1974.
Banin Matan, Tsaban Boaz
doaj   +1 more source

The Jacobson radical of the endomorphism ring of a projective module. [PDF]

, 1970
In a recently published paper [3], the elements of the Jacobson radical of a ring of row-finite matrices over an arbitrary ring R R are characterized as those matrices with entries in the Jacobson radical of R R which ...
J. Zelmanowitz, R. Ware
core   +1 more source