Results 41 to 50 of about 259 (129)
Automorphisms of partial endomorphism semigroups [PDF]
, 2009 Publicationes Mathematicae DebrecenIn this paper we propose a general recipe for calculating the automorphism groups of semigroups consisting of partial endomorphisms of relational structures with a single m-ary relation for any m 2 N over a finite set.
Jesus, Manuel M. +4 more
core
The rank of the endomorphism monoid of a uniform partition
, 2009 The rank of a semigroup is the cardinality of a smallest generating set. In this paper we compute the rank of the endomorphism monoid of a non-trivial uniform partition of a finite set, that is, the semigroup of those transformations of a finite set that
Araújo, João, Schneider, Csaba
core +1 more source
Endomorphisms of semigroups of oriented transformations
Semigroup Forum, 2022 In this paper, we characterize the monoid of endomorphisms of the semigroup of all oriented full transformations of a finite chain, as well as the monoid of endomorphisms of the semigroup of all oriented partial transformations and the monoid of endomorphisms of the semigroup of all oriented partial permutations of a finite chain.
Li, De Biao, Fernandes, Vítor H.
openaire +2 more sources
Journal of the London Mathematical Society, Volume 110, Issue 5, November 2024.Abstract For large classes of even‐dimensional Riemannian manifolds (M,g)$(M,g)$, we construct and analyze conformally invariant random fields. These centered Gaussian fields h=hg$h=h_g$, called co‐polyharmonic Gaussian fields, are characterized by their covariance kernels k which exhibit a precise logarithmic divergence: |k(x,y)−log1d(x,y)|≤C$\big ...
Lorenzo Dello Schiavo +3 more
wiley +1 more source
Aspects of endomorphism monoids of certain algebras [PDF]
, 2023 This thesis is concerned with the study of endomorphism monoids of certain algebras. We first describe the semigroup structure of a family of subsemigroups of the endomorphism monoid of an independence algebra A. Each of these subsemigroups is associated
Grau, Ambroise
core
The Calogero–Moser derivative nonlinear Schrödinger equation
Communications on Pure and Applied Mathematics, Volume 77, Issue 10, Page 4008-4062, October 2024.Abstract We study the Calogero–Moser derivative nonlinear Schrödinger NLS equation i∂tu+∂xxu+(D+|D|)(|u|2)u=0$$\begin{equation*} i\partial _t u +\partial _{xx} u + (D+|D|)(|u|^2) u =0 \end{equation*}$$posed on the Hardy–Sobolev space H+s(R)$H^s_+(\mathbb {R})$ with suitable s>0$s>0$.
Patrick Gérard, Enno Lenzmann
wiley +1 more source
Brieskorn spheres, cyclic group actions and the Milnor conjecture
Journal of Topology, Volume 17, Issue 2, June 2024.Abstract In this paper we further develop the theory of equivariant Seiberg–Witten–Floer cohomology of the two authors, with an emphasis on Brieskorn homology spheres. We obtain a number of applications. First, we show that the knot concordance invariants θ(c)$\theta ^{(c)}$ defined by the first author satisfy θ(c)(Ta,b)=(a−1)(b−1)/2$\theta ^{(c)}(T_{a,
David Baraglia, Pedram Hekmati
wiley +1 more source
An index for continuous semigroups of ∗-endomorphisms of B(b)
, 1989 Continuous semigroups of ∗-endomorphism of B(b) are studied. An index for such semigroups is defined. It is shown that the set of indices corresponds to a set which properly contains the non-negative integers plus a point at ...
Derek W. Robinson +3 more
core +1 more source
Rings of Endomorphisms of Semigroup-Graded Modules
Rocky Mountain Journal of Mathematics, 1996 Various types of endomorphism rings of graded modules over rings graded by finite semigroups are studied. Results of Albu and Năstăsescu on endomorphism rings of group-graded modules are generalized.
G. ABRAMS, MENINI, Claudia
openaire +3 more sources
Equivariant resolutions over Veronese rings
Journal of the London Mathematical Society, Volume 109, Issue 1, January 2024.Abstract Working in a polynomial ring S=k[x1,…,xn]$S={\mathbf {k}}[x_1,\ldots ,x_n]$, where k${\mathbf {k}}$ is an arbitrary commutative ring with 1, we consider the d$d$th Veronese subalgebras R=S(d)$R={S^{(d)}}$, as well as natural R$R$‐submodules M=S(⩾r,d)$M={S^{({\geqslant r},{d})}}$ inside S$S$.
Ayah Almousa +4 more
wiley +1 more source