Results 131 to 140 of about 474 (166)

Stability in Witt rings and abelian subgroups of pro-2-galois groups

Rocky Mountain Journal of Mathematics, 1989
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The size-distance scaling of real objects and afterimages is equivalent in typical but not reduced visual environments. [PDF]

Exp Brain Res
Millard AS, Sperandio I, Chouinard PA.
europepmc   +1 more source

Ecosystem services provided by spiders. [PDF]

Biol Rev Camb Philos Soc
Cardoso P, Pekár S, Birkhofer K, Chuang A, Fukushima CS, Hebets EA, Henaut Y, Hesselberg T, Malumbres-Olarte J, Michálek O, Michalko R, Scott C, Wolff J, Mammola S.   +13 more
europepmc   +1 more source

Nodules-associated Klebsiella oxytoca complex: genomic insights into plant growth promotion and health risk assessment. [PDF]

BMC Microbiol
Youseif SH, El-Megeed FHA, Soliman MS, Ageez A, Mohamed AH, Ali SA, El-Kholy AA.   +6 more
europepmc   +1 more source

An exact sequence of Grothendieck-Witt rings (Transformation Group Theory and Surgery)

An exact sequence of Grothendieck-Witt rings (Transformation Group Theory and Surgery)
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Integral rings of groups of period two and generalizations of Witt rings

Mathematical Notes, 1973
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
A A Bel'Skii
exaly   +2 more sources

Witt Rings and Galois Groups

The Annals of Mathematics, 1996
This paper is concerned with the connections between the Witt ring of a field and the structure of certain Galois extensions of that field. In particular, it is shown that the Witt ring determines, and is determined by, the Galois group of a certain 2-extension of the field (with an unavoidable uncertainty over the characteristic of the Witt ring in ...
Mináč, Ján, Spira, Michel
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Decomposition of Witt Rings and Galois Groups

Canadian Journal of Mathematics, 1995
AbstractTo each fieldFof characteristic not 2, one can associate a certain Galois group 𝒢F, the so-calledW-group ofF, which carries essentially the same information as the Witt ringW(F)ofF. In this paper we show that direct products of Witt rings correspond to free products of these Galois groups (in the appropriate category), group ring construction ...
Mináč, Ján, Smith, Tara L.
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Annihilating Polynomials for Group Rings and Witt Rings

Canadian Mathematical Bulletin, 1989
AbstractNatural annihilating polynomials for group rings are produced; this yields, as a special case, the annihilating polynomials for Witt rings that have been discovered only recently.
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ON THE WITT GROUP OF A 2-ADIC GROUP RING

The Quarterly Journal of Mathematics, 1980
Z2TT, where -n is a 2-group, endowed with the "orientable" involution f = g~1. In this paper we explicitly calculate the Witt group W(A) of Hermitian forms over A with respect to this involution. The difficult part of the calculation is the quotient W(A)/W™(A), where W°(A) denotes the subgroup of even Hermitian forms.
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