Results 11 to 20 of about 410 (45)

Quantization on Curves [PDF]

open access: yes, 2006
Deformation quantization on varieties with singularities offers perspectives that are not found on manifolds. Essential deformations are classified by the Harrison component of Hochschild cohomology, that vanishes on smooth manifolds and reflects ...
A.M. Garsia   +16 more
core   +2 more sources

Noncommutative Tsen's theorem in dimension one [PDF]

open access: yes, 2015
Let k be a field. In this paper, we find necessary and sufficient conditions for a noncommutative curve of genus zero over k to be a noncommutative P^1-bundle. This result can be considered a noncommutative, one-dimensional version of Tsen's theorem.
Nyman, A.
core   +1 more source

Weingarten integration over noncommutative homogeneous spaces [PDF]

open access: yes, 2017
We discuss an extension of the Weingarten formula, to the case of noncommutative homogeneous spaces, under suitable "easiness" assumptions. The spaces that we consider are noncommutative algebraic manifolds, generalizing the spaces of type $X=G/H\subset ...
Banica, Teodor
core   +4 more sources

From exceptional collections to motivic decompositions via noncommutative motives [PDF]

open access: yes, 2012
Making use of noncommutative motives we relate exceptional collections (and more generally semi-orthogonal decompositions) to motivic decompositions. On one hand we prove that the Chow motive M(X) of every smooth proper Deligne-Mumford stack X, whose ...
Marcolli, Matilde, Tabuada, Goncalo
core   +3 more sources

On the periodic solutions of certain fourth and fifth order vector differential equations [PDF]

open access: yes, 2005
The aim of the present paper is to establish some sufficient conditions which ensure that equations (1.1) and (1.2) have no periodic solution other than the trivial solution X ...
E. Tunç
core  

Criteria for \sigma-ampleness

open access: yes, 2000
In the noncommutative geometry of Artin, Van den Bergh, and others, the twisted homogeneous coordinate ring is one of the basic constructions. Such a ring is defined by a $\sigma$-ample divisor, where $\sigma$ is an automorphism of a projective scheme X.
Keeler, Dennis S.
core   +1 more source

Rational points on varieties and Morita equivalences of $C^*$-algebras

open access: yes, 2020
Let $V(k)$ be a projective variety over a number field $k\subset\mathbf{C}$ and let $\mathscr{A}_V$ be the Serre $C^*$-algebra of $V(k)$. We construct a functor $F: V(k)\mapsto \mathscr{A}_V$, such that the $\mathbf{C}$-isomorphic ($k$-isomorphic, resp.)
Nikolaev, Igor
core  

Linear regulator design for stochastic systems by a multiple time scales method [PDF]

open access: yes, 1976
Bibliography: leaves 10-11.NASA Grant NGL-22-009-124, and ERDA Grant ERDA-E(49)-2087.Demosthenis Teneketzis, Nils R.

core  

Singular curves and quasi-hereditary algebras

open access: yes, 2016
In this article we construct a categorical resolution of singularities of an excellent reduced curve $X$, introducing a certain sheaf of orders on $X$. This categorical resolution is shown to be a recollement of the derived category of coherent sheaves ...
Burban, Igor   +2 more
core   +1 more source

On Complex Manifolds and Observable Schemes [PDF]

open access: yes, 2012
We work out the construction of a Stein manifold from a commutative Arens-Michael algebra, under assumptions that are mild enough for the process to be useful in practice.
Le-Bert, Rodrigo Vargas
core  

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