Results 81 to 90 of about 163,882 (275)

Asymptotics of Symmetry in Matroids [PDF]

, 2016
We prove that asymptotically almost all matroids have a trivial automorphism group, or an automorphism group generated by a single transposition. Additionally, we show that asymptotically almost all sparse paving matroids have a trivial automorphism ...
Pendavingh, Rudi, van der Pol, Jorn
core   +2 more sources

Constructing biquandles

, 2019
We define biquandle structures on a given quandle, and show that any biquandle is given by some biquandle structure on its underlying quandle. By determining when two biquandle structures yield isomorphic biquandles, we obtain a relationship between the ...
Horvat, Eva
core   +2 more sources

Toeplitz subshift whose automorphism group is not finitely generated [PDF]

, 2014
We compute an explicit representation of the (topological) automorphism group or a particular Toeplitz subshift. The automorphism group is a (non-finitely generated) subgroup of rational numbers under addition and the shift map corresponds to the ...
Ville Salo
semanticscholar   +1 more source

On Endomorphism Universality of Sparse Graph Classes

Journal of Graph Theory, EarlyView.
ABSTRACT We show that every commutative idempotent monoid (a.k.a. lattice) is the endomorphism monoid of a subcubic graph. This solves a problem of Babai and Pultr and the degree bound is best‐possible. On the other hand, we show that no class excluding a minor can have all commutative idempotent monoids among its endomorphism monoids. As a by‐product,
Kolja Knauer, Gil Puig i Surroca
wiley   +1 more source

On the R-automorphisms of formal power series on several indeterminates and with coefficients over the ring R

Selecciones Matemáticas, 2022
In this paper, we show a way to characterize the R-automorphisms of formal power series on several indeterminates and with coefficients over a commutative ring with identity, R.
Soledad Ramírez C., Anderson Cárdenas F.   +1 more
doaj   +1 more source

On the structure of quantum automorphism groups [PDF]

, 2014
We compute the $ K $-theory of quantum automorphism groups of finite dimensional $ C^* $-algebras in the sense of Wang. The results show in particular that the $ C^* $-algebras of functions on the quantum permutation groups $ S_n^+ $ are pairwise non ...
Christian Voigt
semanticscholar   +1 more source

Automorphism groups of smooth plane curves [PDF]

Kodai Mathematical Journal, 2013
The author determines the structure of automorphism groups of smooth plane curves of degree at least four. Furthermore, he gives some upper bounds for the order of automorphism groups of smooth plane curves and classifies the cases with large ...
Takeshi Harui
semanticscholar   +1 more source

On Automorphisms of Subfactors

Journal of Functional Analysis, 1996
AbstractWe classify, up to outer conjugacy, free actions ofZon an inclusion of hyperfinite type II1factors of finite index, of finite depth, and for which the principal graph is one of the following:An,n⩾2,E6,E8, or a finite group. As a consequence, we obtain the classification of hyperfinite type IIIλsubfactors of the same index of the Powers factorRλ,
openaire   +3 more sources

General infinitesimal variations of the Hodge structure of ample curves in surfaces

Mathematische Nachrichten, EarlyView.
Abstract Given a smooth projective complex curve inside a smooth projective surface, one can ask how its Hodge structure varies when the curve moves inside the surface. In this paper, we develop a general theory to study the infinitesimal version of this question in the case of ample curves.
Víctor González‐Alonso, Sara Torelli
wiley   +1 more source

The criteria for automorphisms on finite-dimensional algebras

Electronic Research Archive
In this paper, we will establish a criterion for automorphisms of finite-dimensional algebras. As an application, we will describe all automorphisms of the single-parameter generalized quaternion algebra. Additionally, we will obtain all automorphisms of
Yanni Yang, Quanguo Chen
doaj   +1 more source