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We study automorphisms of quasi-smooth hypersurfaces in weighted projective spaces, extending classical results for smooth hypersurfaces in projective space to the weighted setting. We establish effective criteria for when a power of a…

Algebraic Geometry · Mathematics 2026-04-16 Alvaro Liendo , Ana Julisa Palomino

The derivation algebras, automorphism groups and second cohomology groups of the generalized loop Schr\"{o}dinger-Virasoro algebras are completely determined in this paper.

Quantum Algebra · Mathematics 2015-09-08 Haibo Chen , Guangzhe Fan , Jianzhi Han , Yucai Su

We study algebra endomorphisms and derivations of some localized down-up algebras $\A$. First, we determine all the algebra endomorphisms of $\A$ under some conditions on $r$ and $s$. We show that each algebra endomorphism of $\A$ is an…

Rings and Algebras · Mathematics 2014-03-27 Xin Tang

A dynamical Mertens' theorem for ergodic toral automorphisms with error term O(N^{-1}) is found, and the influence of resonances among the eigenvalues of unit modulus is examined. Examples are found with many more, and with many fewer,…

Dynamical Systems · Mathematics 2013-05-28 S. Jaidee , S. Stevens , T. Ward

In this paper, we determine the derivation algebra and automorphism group of the twisted N=2 superconformal algebra. Then we generalize the relative results to the generalized twisted N=2 superconformal algebra in the final section.

Rings and Algebras · Mathematics 2015-03-13 Huanxia Fa

Let S be a subsemigroup of an abelian torsion-free group G. If S is a positive cone of G, then all C*-algebras generated by faithful isometrical non-unitary representations of S are canonically isomorphic. Proved by Murphy, this statement…

Operator Algebras · Mathematics 2012-12-04 M. A. Aukhadiev , V. H. Tepoyan

The main purpose of this paper is to describe some published results and outline corresponding approaches which when applied to automorphism groups of algebras or groups establish that these groups are linear or non-linear.

Group Theory · Mathematics 2017-09-28 Vitalii Roman'kov

We prove an algebraic extension theorem for the computably enumerable sets, $\mathcal{E}$. Using this extension theorem and other work we then show if $A$ and $\hat{A}$ are automorphic via $\Psi$ then they are automorphic via $\Lambda$…

Logic · Mathematics 2007-05-23 Peter Cholak , Leo Harrington

In this work we are going to study the dynamics of the linear automorphisms of a measure convolution algebra over a finite group, $T(\mu)=\nu * \mu$. In order to understand an classify the asymptotic behavior of this dynamical system we…

Dynamical Systems · Mathematics 2014-04-28 Alexandre Baraviera , Elismar R. Oliveira , Fagner B. Rodrigues

We exhibit a family of *-isomorphisms mapping the CAR algebra onto its even subalgebra.

Mathematical Physics · Physics 2008-11-06 Carsten Binnenhei

We utilize the structure of quasiautomorphic forms over an arbitrary Hecke triangle group to define a new vector analogue of an automorphic form. We supply a proof of the functional equations that hold for these functions modulo the group…

Number Theory · Mathematics 2026-01-01 Michael Andrew Henry

We describe explicitly Lie superalgebra isomorphisms between the Lie superalgebras of first-order superdifferential operators on supermanifolds, showing in particular that any such isomorphism induces a diffeomorphism of the supermanifolds.…

Differential Geometry · Mathematics 2010-11-09 J. Grabowski , A. Kotov , N. Poncin

We take a categorical approach to describe ternary derivations and ternary automorphisms of triangular algebras. New classes of automorphisms and derivations of triangular algebras are also introduced and studied.

We prove the automorphism conjecture for ordered sets of width less than or equal to 11. The proof supports the meta conjecture that a large number of automorphisms is achievable only as some type of product of independent automorphisms on…

Combinatorics · Mathematics 2023-05-24 Bernd Schröder

We study bounds for algebraic twists sums of automorphic coefficients by trace functions of composite moduli.

Number Theory · Mathematics 2023-04-18 Yongxiao Lin , Philippe Michel

Let S be an essentially smooth scheme over a field and l a prime number invertible on S. We show that the algebra of bistable operations in the mod l motivic cohomology of smooth S-schemes is generated by the motivic Steenrod operations.…

Algebraic Geometry · Mathematics 2013-08-01 Marc Hoyois , Shane Kelly , Paul Arne Østvær

We outline a new approach to classify real forms and automorphisms of finite order of affine Kac-Moody algebras.

Rings and Algebras · Mathematics 2007-12-17 Ernst Heintze

We study the subalgebra of the lattice vertex operator algebra $V_{\sqrt{2}A_2}$ consisting of the fixed points of an automorphism which is induced from an order 3 isometry of the root lattice $A_2$. We classify the simple modules for the…

Quantum Algebra · Mathematics 2013-12-18 Kenichiro Tanabe , Hiromichi Yamada

This is a survey on the automorphism groups in various classes of affine algebraic surfaces and the algebraic group actions on such surfaces. Being infinite-dimensional, these automorphism groups share some important features of algebraic…

Algebraic Geometry · Mathematics 2025-03-06 Sergei Kovalenko , Alexander Perepechko , Mikhail Zaidenberg

We provide a coherent picture of our efforts thus far in extending real algebra and its links to the theory of quadratic forms over ordered fields in the noncommutative direction, using hermitian forms and "ordered" algebras with…

Rings and Algebras · Mathematics 2018-04-19 Vincent Astier , Thomas Unger