Results 11 to 20 of about 355,905 (327)
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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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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A characterization of p-bases of rings of constants [PDF]
Open Mathematics, 2013 Abstract We obtain two equivalent conditions for m polynomials in n variables to form a p-basis of a ring of constants of some polynomial K-derivation, where K is a unique factorization domain of characteristic p > 0. One of these conditions involves Jacobians while the other some properties of factors.
Jędrzejewicz Piotr
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Structure constants for Hecke and representation rings [PDF]
, 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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Black ring with a positive cosmological constant [PDF]
Physical Review D, 2007 v2. LaTex, 19 pages.
Chong‐Sun Chu, Shou-Huang Dai
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Rings of constants of linear derivations on Fermat rings [PDF]
Communications in Algebra, 2018 In this paper we characterize all the linear $\mathbb{C}$-derivations of the Fermat ring. We show that the Fermat ring has linear $\mathbb{C}$-derivations with trivial ring of constants and construct some examples.
Marcelo Oliveira Veloso, I. P. Shestakov
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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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Infinite Easier Waring Constants for Commutative Rings [PDF]
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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Computing an arithmetic constant related to the ring of Gaussian integers [PDF]
Mathematics of Computation, 1985 We compute the analogue for Z [ i ] {\mathbf {Z}}[i] of Euler’s constant, that is δ = lim n → + ∞ δ ...
François Gramain, Michel Weber
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Evaluation of the true-strength characteristics for isotropic materials using ring tensile test
Nuclear Engineering and Technology, 2021 The paper proposes a technique for reconstructing the true hardening curve of isotropic materials from ring tensile tests. Neutron irradiated 42XNM alloy tensile properties were investigated.
A.S. Frolov, I.V. Fedotov, B.A. Gurovich
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