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Troisi\`eme groupe de cohomologie non ramifi\'ee d'un solide cubique sur un corps de fonctions d'une variable [PDF]

open access: yesÉpijournal de Géométrie Algébrique, 2018
En combinant une m\'ethode de C. Voisin avec la descente galoisienne sur le groupe de Chow en codimension $2$, nous montrons que le troisi\`eme groupe de cohomologie non ramifi\'ee d'un solide cubique lisse d\'efini sur le corps des fonctions d'une ...
Jean-Louis Colliot-Thélène   +1 more
doaj   +1 more source

Numerical algebraic geometry and semidefinite programming

open access: yesResults in Applied Mathematics, 2021
Standard interior point methods in semidefinite programming can be viewed as tracking a solution path for a homotopy defined by a system of bilinear equations.
Jonathan D. Hauenstein   +3 more
doaj   +1 more source

Beyond Algebraic Superstring Compactification: Part II

open access: yesAxioms
The most impressively prolific exploration of superstring models (aiming for our physical reality) has been focused on worldsheet-supersymmetric gauged linear sigma models and the closely associated complex-algebraic toric geometry.
Tristan Hübsch
doaj   +1 more source

Determination of the number of texture segments using wavelets

open access: yesElectronic Journal of Differential Equations, 2001
This paper presents a robust method of determining the number of texture segments in an image. We take an $N imes N$ image and decompose it into $n imes n$ blocks.
Joseph P. Havlicek, Peter C. Tay
doaj  

The construction problem for Hodge numbers modulo an integer in positive characteristic—ERRATUM

open access: yesForum of Mathematics, Sigma, 2021
Remy van Dobben de Bruyn   +1 more
doaj   +1 more source

On the Representation of the Lattices of the Algebraic Sets of the Universal Algebras

open access: yesИзвестия Иркутского государственного университета: Серия "Математика", 2019
The concept of an algebraic set is a basic concept of the classical algebraic geometry over fields. This concept, along with the concept of an algebraic lattice of algebraic sets is the basic concept of so-called algebraic geometry of universal algebras.
A.G. Pinus
doaj   +1 more source

THE ANALYSIS OF IMAGES IN N-POINT GRAVITATIONAL LENS BY METHODS OF ALGEBRAIC GEOMETRY

open access: yesActa Polytechnica, 2017
This paper is devoted to the study of images in N-point gravitational lenses by methods of algebraic geometry. In the beginning, we carefully define images in algebraic terms.
Albert Kotvytskiy   +2 more
doaj   +1 more source

Quotients of an affine variety by an action of a torus

open access: yesOpen Mathematics, 2013
Chuvashova Olga, Pechenkin Nikolay
doaj   +1 more source

On the Algebraic Geometry of Multiview

open access: yesFoundations
We study the multiviews of algebraic space curves X from n pin-hole cameras of a real or complex projective space. We assume the pin-hole centers to be known, i.e., we do not reconstruct them. Our tools are algebro-geometric.
Edoardo Ballico
doaj   +1 more source

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