Results 11 to 20 of about 160,813 (290)

Differential Bundles in Commutative Algebra and Algebraic Geometry

open access: green, 2023
In this paper, we explain how the abstract notion of a differential bundle in a tangent category provides a new way of thinking about the category of modules over a commutative ring and its opposite category. MacAdam previously showed that differential bundles in the tangent category of smooth manifolds are precisely smooth vector bundles.
G. S. H. Cruttwell   +1 more
openalex   +4 more sources

Noncommutative differential geometry on crossed product algebras

open access: greenJournal of Algebra, 2023
We provide a differential structure on arbitrary cleft extensions $B:=A^{\mathrm{co}H}\subseteq A$ for an $H$-comodule algebra $A$. This is achieved by constructing a covariant calculus on the corresponding crossed product algebra $B\#_σH$ from the data of a bicovariant calculus on the structure Hopf algebra $H$ and a calculus on the base algebra $B ...
Andrea Sciandra, Thomas Weber
openalex   +5 more sources

Algebraic geometry and local differential geometry [PDF]

open access: bronzeAnnales scientifiques de l'École normale supérieure, 1979
Phillip Griffiths, Joseph Harris
openalex   +3 more sources

Completeness in partial differential algebraic geometry

open access: bronzeJournal of Algebra, 2014
Abstract This paper is part of the model theory of fields of characteristic 0, equipped with m commuting derivation operators ( DCF 0 , m ). It continues to partial differential fields work begun by Wai-Yan Pong, who treated the case m = 1 .
James Freitag
openalex   +3 more sources

An algebraic model of transitive differential geometry [PDF]

open access: goldBulletin of the American Mathematical Society, 1964
Victor Guillemin, Shlomo Sternberg
openalex   +4 more sources

Abelian reduction in differential-algebraic and bimeromorphic geometry

open access: bronzeAnnales de l'Institut Fourier
A new tool for the model theory of differentially closed fields and of compact complex manifolds is here developed. In such settings, it is shown that a type internal to the field of constants (resp. to the projective line) admits a maximal image whose binding group is an abelian variety.
Rémi Jaoui, Rahim Moosa
openalex   +3 more sources

Differential Geometry Revisited by Biquaternion Clifford Algebra [PDF]

open access: green, 2015
In the last century, differential geometry has been expressed within various calculi: vectors, tensors, spinors, exterior differential forms and recently Clifford algebras. Clifford algebras yield an excellent representation of the rotation group and of the Lorentz group which are the cornerstones of the theory of moving frames.
Patrick Girard   +4 more
openalex   +6 more sources

Linear algebra and differential geometry on abstract Hilbert space [PDF]

open access: goldInternational Journal of Mathematics and Mathematical Sciences, 2005
Isomorphisms of separable Hilbert spaces are analogous to isomorphisms of n‐dimensional vector spaces. However, while n‐dimensional spaces in applications are always realized as the Euclidean space Rn, Hilbert spaces admit various useful realizations as spaces of functions.
Alexey A. Kryukov
openalex   +4 more sources

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