共查询到20条相似文献,搜索用时 0 毫秒
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M. T. Anderson 《Geometric And Functional Analysis》1992,2(1):29-89
Partially supported by NSF Grants DMS 87-01137 and 89-01303 相似文献
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Luis Escauriaza 《Israel Journal of Mathematics》1996,94(1):353-366
We show that Dahlberg's vanishing trace condition measuring the disagreement between the coefficients of two elliptic operators
preserves harmonic measures whose logarithm belongs to VMO. 相似文献
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M. Lashkarizadeh Bami 《manuscripta mathematica》1992,77(1):161-167
In the present paper, for a large family of topological semigroups which includes the topological groups and discrete semigroups
as elementary examples, it is shown that the representation algebraR(S) is identical to the algebra of Fourier transforms onS. 相似文献
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F. W. Gehring 《Acta Mathematica》1973,130(1):265-277
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The aim of the present paper is to prove new equivalence results and Lp-stauration results on weighted simultaneous approximation by the method of Bernstein-Durrmeyer operators (including results
in [7]). One of the main tools and crucial estimates managing the converse results is given by a direct modified Vornorskaja
theorem which uses the third order weighted modulus of smoothness.
Supported by NSF of Hebei Province. 相似文献
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《Discrete Mathematics》2007,307(7-8):854-865
A graph is called 1-planar if it can be drawn in the plane so that each its edge is crossed by at most one other edge. In the paper, we study the existence of subgraphs of bounded degrees in 1-planar graphs. It is shown that each 1-planar graph contains a vertex of degree at most 7; we also prove that each 3-connected 1-planar graph contains an edge with both endvertices of degrees at most 20, and we present similar results concerning bigger structures in 1-planar graphs with additional constraints. 相似文献
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Any stationary 1-dependent Markov chain with up to four states is a 2-block factor of independent, identically distributed random variables. There is a stationary 1-dependent Markov chain with five states which is not, even though every 1-dependent renewal process is a 2-block factor. 相似文献
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Faith Carl 《代数通讯》2013,41(6):559-571
For a ring R, the following two conditions are equivalent:. (1) If E is an indecomposable injective right R-module, then End ER is a field (not necesarily commutative). (2) Every co-irreducible rigtht ideal is critical. Since (2) has been characterized ideal-theoretically, this amounts to an ideal-theoretical characterization of (1). These rings come up to the study of (QI) rings in which every quasi-injective module is injective. 相似文献
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We prove, under an assumption on the critical points of a real-valued function, that the symmetric Ising perceptron exhibits the ‘frozen 1-RSB’ structure conjectured by Krauth and Mézard in the physics literature; that is, typical solutions of the model lie in clusters of vanishing entropy density. Moreover, we prove this in a very strong form conjectured by Huang, Wong, and Kabashima: a typical solution of the model is isolated with high probability and the Hamming distance to all other solutions is linear in the dimension. The frozen 1-RSB scenario is part of a recent and intriguing explanation of the performance of learning algorithms by Baldassi, Ingrosso, Lucibello, Saglietti, and Zecchina. We prove this structural result by comparing the symmetric Ising perceptron model to a planted model and proving a comparison result between the two models. Our main technical tool towards this comparison is an inductive argument for the concentration of the logarithm of number of solutions in the model. 相似文献
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A (0, 1)-matrix M has the consecutive 1's property for columns if the rows of M can be permuted so that the 1's in each column appear consecutively. A graph-theoretic approach is used to characterize matrices with this property in terms of forbidden submatrices. Graphs whose adjacency matrix has this property are also characterized. 相似文献
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It is shown that under the combined influence of temperature and tensile stresses the spherical structure of crosslinked PN-1 copolymer becomes ellipsoidal. The change of shape is associated with the zone of high-elastic deformation.Institute of Mechanics, Academy of Sciences of the Ukrainian SSR, Kiev. Translated from Mekhanika Polimerov, No. 6, pp. 1129–1131, November–December, 1969. 相似文献
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Hartwig, Larsson and Silvestrov in [J.T. Hartwig, D. Larsson, S.D. Silvestrov, Deformations of Lie algebras using σ-derivations, J. Algebra 295 (2) (2006) 314–361] defined a bracket on σ-derivations of a commutative algebra. We show that this bracket preserves inner derivations, and based on this obtain structural results providing new insights into σ-derivations on Laurent polynomials in one variable. 相似文献