Results 11 to 20 of about 343,735 (322)
Constants are definable in rings of analytic functions [PDF]
Proceedings of the American Mathematical Society, 1994 The analytic functions defined in a fixed domain form a ring with pointwise addition and multiplication. We describe a way to define constants in the ring using a first-order formula which is independent of the domain.
Taneli Huuskonen
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Dependence on dimension of a constant related to the Grötzsch ring [PDF]
Proceedings of the American Mathematical Society, 1976 For the constant λ n = lim a → 0 ( mod R G , n ( a )
G. D. Anderson
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Dynamical black rings with a positive cosmological constant [PDF]
Physical Review D, 2009 11 pages, 16 figures, references ...
Masashi Kimura
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Structure constants for Hecke and representation rings
International Mathematics Research Notices, 2003 We study the structure constants defining two related rings: the spherical Hecke algebra of a split connected reductive group over a non-Archimedean local field, and the representation ring of the Langlands dual group.
Thomas J. Haines
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Subring of constants of a ring of characteristic p>0
Le Matematiche, 1993 Let A be a local ring of characteristic p>0 which has a p-basis over a subring C, and B be the subring of constants of A for a derivation (or derivations ) of A over C. We give a sufficient condition for B to have a p-basis over C. We add some examples.
Marilena Crupi
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On the ring of constants for derivations of power series rings in two variables [PDF]
Colloquium Mathematicum, 2001 Let k((x,y)) be the formal power series ring in two variables over a field k of characteristic zero and let d be a nonzero derivation of k((x,y)). We prove that if Ker(d) 6 k then Ker(d) =Ker( ), where is a jacobian derivation of k((x,y)). Moreover, we prove that Ker(d) is of the form k((h)), for some h 2 k((x,y)). 1. Introduction.
Leonid Makar-Limanov, Andrzej Nowicki
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Rate Constant for the Ring Opening of the 2,2-Difluorocyclopropylcarbinyl Radical [PDF]
Organic Letters, 2000 The rate constant for the unimolecular ring opening of the 2,2-difluorocyclopropylcarbinyl radical was determined via its competitive bimolecular trapping by TEMPO. The value of this rate constant (3.4 x 10(11) s(-)(1) at 99.3 degrees C) is about 500 times larger than that of the parent, unfluorinated radical and about 5 times smaller than that of the ...
Feng Tian, William R. Dolbier
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Constrained dynamics of a polymer ring enclosing a constant area [PDF]
Physical Review E, 2005 6 ...
Arti Dua, Thomas A. Vilgis
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Infinite Easier Waring Constants for Commutative Rings
Topology and its Applications, 2010 Suppose n >= 2. We show that there is no integer v >= 1 such that for all commutative rings R with identity, every element of the subring J(2^n,R) of R generated by 2^n-th powers can be written in the form \pm f_1^{2^n} \pm \cdots \pm f_v^{2^n} for some f_1,...,f_v \in R and some choice of signs.
Ted Chinburg
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Constant-Beamwidth Beamforming with Concentric Ring Arrays [PDF]
Sensors, 2021 Designing beampatterns with constant beamwidth over a wide range of frequencies is useful in many applications in speech, radar, sonar and communication. In this paper, we design constant-beamwidth beamformers for concentric ring arrays. The proposed beamformers utilize the circular geometry to provide improved beamwidth consistency compared to ...
Avital Kleiman +2 more
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