Results 41 to 50 of about 14,418,431 (251)
Witt groups of Severi-Brauer varieties and of function fields of conics [PDF]
Épijournal de Géométrie AlgébriqueThe Witt group of skew hermitian forms over a division algebra $D$ with symplectic involution is shown to be canonically isomorphic to the Witt group of symmetric bilinear forms over the Severi-Brauer variety of $D$ with values in a suitable line bundle.
Anne Quéguiner-Mathieu +1 more
doaj +1 more source
Molecular Analysis of Parasitoid Flies Tachinidae
RUDN Journal of Agronomy and Animal Industries, 2022 The parasitoids from Tachinidae family have important role in biological control; nevertheless, the phylogenetic relationships of supra genera groups are poorly studied. Here, we present phylogenetic analyses of the family based on molecular data.
El-Sayed El-Hashash Arafa
doaj +1 more source
Symbol length in the Brauer group of a field [PDF]
, 2014 We bound the symbol length of elements in the Brauer group of a field K containing a Cm field (for example any field containing an algebraically closed field or a finite field), and solve the local exponent-index problem for a Cm field F . In particular,
Eliyahu Matzri
semanticscholar +1 more source
Preliminary list of horse flies (Diptera, Tabanidae) of Serbia
ZooKeys, 2011 Thirty six species of horse flies (Tabanidae) were previously known from Serbia (Europe). The present faunistic study of horse flies (Tabanidae) has resulted in the recording of the 4 new species Atylotus fulvus (Meigen, 1804); Tabanus miki Brauer in ...
Stjepan Krcmar
doaj +1 more source
ON THE BRAUER GROUP OF DIAGONAL CUBIC SURFACES [PDF]
, 2014 We are concerned with finding explicit generators of the Brauer group of diagonal cubic surfaces in terms of norm residue symbols, which was originally studied by Manin. We introduce the notion of uniform generators and find that the Brauer group of some
Tetsuya Uematsu
semanticscholar +1 more source
The Brauer group and indecomposable $(2,1)$-cycles [PDF]
Compositio Mathematica, 2014 We show that the torsion in the group of indecomposable $(2,1)$-cycles on a smooth projective variety over an algebraically closed field is isomorphic to a twist of its Brauer group, away from the characteristic.
B. Kahn
semanticscholar +1 more source
The Picard group of Brauer-Severi varieties
Open Mathematics, 2018 In this paper, we provide explicit generators for the Picard groups of cyclic Brauer-Severi varieties defined over the base field. In particular,we provide such generators for all Brauer-Severi surfaces.
Badr Eslam +2 more
doaj +1 more source
Spaces of states of the two-dimensional $O(n)$ and Potts models
SciPost Physics, 2023 We determine the spaces of states of the two-dimensional $O(n)$ and $Q$-state Potts models with generic parameters $n,Q\in \mathbb{C}$ as representations of their known symmetry algebras.
Jesper Lykke Jacobsen, Sylvain Ribault, Hubert Saleur
doaj +1 more source
Conic bundle fourfolds with nontrivial unramified Brauer group
Journal of Algebraic Geometry, 2019 We derive a formula for the unramified Brauer group of a general class of rationally connected fourfolds birational to conic bundles over smooth threefolds.
Asher Auel +3 more
semanticscholar +1 more source
Uniform distribution of Hasse invariants
International Journal of Mathematics and Mathematical Sciences, 1985 I. Schur's study of simple algebras around the turn of the century, and subsequent investigations by R. Brauer, E. Witt and others, were later reformulated in terms of what is now called the Schur subgroup of the Brauer group.
R. A. Mollin
doaj +1 more source