Results 21 to 30 of about 9,057,349 (234)

Witt groups of Severi-Brauer varieties and of function fields of conics [PDF]

open access: yesÉpijournal de Géométrie Algébrique
The 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

open access: yesRUDN 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

Preliminary list of horse flies (Diptera, Tabanidae) of Serbia

open access: yesZooKeys, 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

The Picard group of Brauer-Severi varieties

open access: yesOpen 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

open access: yesSciPost 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

Brauer theory for profinite groups

open access: yesJournal of Algebra, 2014
Brauer Theory for a finite group can be viewed as a method for comparing the representations of the group in characteristic 0 with those in prime characteristic. Here we generalize much of the machinery of Brauer theory to the setting of profinite groups.
MacQuarrie, John, Symonds, Peter
openaire   +4 more sources

Uniform distribution of Hasse invariants

open access: yesInternational 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

On the Tate Conjectures for Divisors on a Fibred Variety and on its Generic Scheme Fibre in the Case of Finite Characteristic

open access: yesМоделирование и анализ информационных систем, 2017
We investigate interrelations between the Tate conjecture for divisors on a fibred variety over a finite field and the Tate conjecture for divisors on the generic scheme fibre under the condition that the generic scheme fibre has zero irregularity. Let \(
Tatyana V. Prokhorova
doaj   +1 more source

Taking a Stand Against Air Pollution – The Impact on Cardiovascular Disease: A Joint Opinion from the World Heart Federation, American College of Cardiology, American Heart Association, and the European Society of Cardiology

open access: yesGlobal Heart, 2021
Although the attention of the world and the global health community specifically is deservedly focused on the COVID-19 pandemic, other determinants of health continue to have large impacts and may also interact with COVID-19. Air pollution is one crucial
Michael Brauer   +5 more
doaj   +1 more source

Antea Group Archeologie 2020/137

open access: yes, 2022
In juli en september 2020 heeft Antea Group in opdracht van BNVB Projects B.V. een archeologisch onderzoek uitgevoerd voor het plangebied ‘Grutterij 7-9’ te Amstelveen, gemeente Amstelveen.
Looveren, V. van (Antea Group)
core   +1 more source

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