Results 91 to 100 of about 71,809 (229)

Real models for the framed little n$n$‐disks operads

Journal of Topology, Volume 18, Issue 4, December 2025.
Abstract We study the action of the orthogonal group on the little n$n$‐disks operads. As an application we provide small models (over the reals) for the framed little n$n$‐disks operads. It follows in particular that the framed little n$n$‐disks operads are formal (over the reals) for n$n$ even and coformal for all n$n$.
Anton Khoroshkin, Thomas Willwacher
wiley   +1 more source

Overflying nilpotent horizons

The European Physical Journal C
AbstractWe study solutions of Einstein equations with negative cosmological constant in five dimensions that describe black holes whose event horizons are homogeneous, anisotropic spaces. We focus on the case where the constant-time slices of the horizon are the Nil geometry, the Thurston geometry associated to the Heisenberg group. For such spaces, we
Figueroa, José, Giribet, Gaston, Neira-Gallegos, Anibal, Oliva, Julio, Oyarzo, Marcelo   +4 more
openaire   +3 more sources

NILPOTENT ALGEBRAIC MONOIDS

Journal of Algebra, 1996
Irreducible linear algebraic monoids \(M\) defined over an algebraically closed field are studied. \(M\) is called nilpotent if its group \(G\) of units is a nilpotent group. A characterization of such monoids is obtained in case \(M\) is regular. In particular, nilpotency is then equivalent to the fact that the set \(E(M)\) of idempotents of \(M\) is ...
openaire   +2 more sources

Free nilpotent and nilpotent quadratic Lie algebras

Linear Algebra and its Applications, 2017
In this paper we introduce an equivalence between the category of the t-nilpotent quadratic Lie algebras with d generators and the category of some symmetric invariant bilinear forms on the t-nilpotent free Lie algebra with d generators. Taking into account this equivalence, t-nilpotent quadratic Lie algebras with d generators are classified (up to ...
P. Benito, D. de-la-Concepción, J. Laliena   +2 more
openaire   +2 more sources

The number of nilpotent semigroups of degree 3

, 2012
A semigroup is \emph{nilpotent} of degree 3 if it has a zero, every product of 3 elements equals the zero, and some product of 2 elements is non-zero.
Distler, Andreas, Mitchell, James D.
core  

Almost group theory

, 2015
The notion of almost centralizer and almost commutator are introduced and basic properties are established. They are used to study $\widetilde{\mathfrak M}\_c$-groups, i.
Hempel, Nadja
core   +1 more source

Two-sided essential nilpotence

International Journal of Mathematics and Mathematical Sciences, 1992
An ideal I of a ring A is essentially nilpotent if I contains a nilpotent ideal N of A such that J⋂N≠0 whenever J is a nonzero ideal of A contained in I. We show that each ring A has a unique largest essentially nilpotent ideal EN(A).
Esfandiar Eslami, Patrick Stewart
doaj   +1 more source

Fundamental solutions and harmonic analysis on nilpotent groups [PDF]

, 1990
Alexander Nagel, Fulvio Ricci, E. M. Stein   +2 more
openalex   +1 more source

On pseudo-Hermitian quadratic nilpotent lie algebras [PDF]

, 2023
Mustapha Bachaou, Ignacio Bajo, Mohamed Louzari   +2 more
openalex   +1 more source

Geometrically nilpotent subvarieties

Finite Fields and Their Applications, 2018
We construct some examples of polynomial maps over finite fields that admit subvarieties with a peculiar property: every geometric point is mapped to a fixed point by some iteration of the map, while the whole subvariety is not. Several related open questions are stated and discussed.
openaire   +3 more sources