Results 51 to 60 of about 6,650 (233)
Some isomorphisms for the Brauer groups of a Hopf algebra
, 2001 Using equivalences of categories we provide general isomorphisms between the Brauer groups of different Hopf algebras. One of those is used to prove that the Brauer groups BC(k, H_4, r(1)) for every dual quasitriangular structure r(t) on Sweedler's Hopf ...
CARNOVALE, GIOVANNA
core +1 more source
Journal of the Royal Anthropological Institute, EarlyView.Our current understanding of the origins of Homo sapiens is limited, in part, by the fragmented fossil record from Late Pleistocene and early Holocene Africa. Here, we re‐examine the Kabua 1 cranium, an enigmatic and little‐studied Kenyan fossil discovered in the 1950s. We compare virtual reconstructions created previously by our team with a wide range
Abel Marinus Bosman +7 more
wiley +1 more source
Comparison of arithmetic Brauer groups with geometric Brauer groups
, 2020 Let $X$ be a projective and smooth variety over a field $k$. The goal of this paper is to prove that the cokernel of the canonical map $Br(X)\to Br(X_{k^s})^{G_k}$ has a finite exponent. Both groups are natural invariants arising from consideration of the Tate conjecture of divisors over $X$.
openaire +2 more sources
Formal Brauer groups arising from certain weighted K3 surfaces
, 1999 We compute the height of the formal Brauer groups, and zeta-functions of certain K3 surfaces in weighted projective 3-spaces.
Yui, Noriko
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Journal of the Royal Anthropological Institute, EarlyView.This article presents a synthesis of recent developments in the study of human evolution over the past five years. It begins with an overview of hominin species nomenclature and diversity, followed by an examination of the proposed population bottleneck ∼900,000 years ago.
James Cole +3 more
wiley +1 more source
The genus Allogamus Schmid, 1955 (Trichoptera, Limnephilidae): revised by sexual selection-driven adaptive, non-neutral traits of the phallic organ [PDF]
Opuscula Zoologica Instituti Zoosystematici et Oecologici Universitatis Budapestinensis, 2014 Based upon our previous reviews on the phylogenetic species concept, initial split criteria and fine structure analysis here we summarize population and model thinking as support to our diverged structure matrix procedure to test simply visually or, if ...
Oláh, János +8 more
doaj
Brauer groups and quotient stacks [PDF]
, 2001 A natural question is to determine which algebraic stacks are quotient stacks. In this paper we give some partial answers and relate it to the question of whether, for a scheme X, the natural map from the Brauer group (equivalence classes of Azumaya ...
Kresch A +7 more
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Journal of the Royal Anthropological Institute, EarlyView.The year 2025 marked the ninetieth since a fossil hominin occipital bone was discovered in Swanscombe, southeast England. In subsequent years, its parietal bones were found, producing what remains the oldest partial cranium from Britain today. In the earliest analyses, it was interpreted as a descendant of the infamous fraudulent fossil Piltdown Man ...
Emma E. Bird, Chris Stringer
wiley +1 more source
Unramified Brauer groups and isoclinism
Ars Mathematica Contemporanea, 2013 We show that if $G_1$ and $G_2$ are isoclinic groups, then their Bogomolov multipliers are isomorphic.
openaire +4 more sources
International Journal of Urban and Regional Research, EarlyView.Abstract Waste‐to‐biofuel (WTB) programs have gained popularity as a municipal circular economy and an emissions reduction strategy. The upgrading of biofuels to renewable natural gas (RNG) has drawn particular interest, as RNG can displace conventional fossil fuels in any existing natural gas end use and be delivered through existing pipeline ...
Taylor Davey
wiley +1 more source