搜索结果: 1-15 共查到“应用数学 fields”相关记录18条 . 查询时间(0.078 秒)
Evolution of particle separation in slowly decorrelating velocity fields
particle separation slowly decorrelating velocity fields
2015/7/14
We consider the evolution of the separation distance between two particles advected by a random velocity field with slowly decaying temporal and spatial correlations in the weak coupling regime. It ha...
A note on proper affine vector fields in Bianchi type IV space-times
Affine vector fields holonomy and decomposability
2010/9/21
Affine vector fields of Bianchi type IV space-times are investigated using holonomy and decomposability, the rank of the 6× 6 Riemann matrix and direct integration technique. From the above study it f...
Pair-wise Markov Random Fields Applied to the Design of Low Complexity MIMO Detectors
Pair-wise Markov Random Fields Design Low Complexity MIMO Detectors
2010/11/24
Pair-wise Markov random fields (MRF) are considered for application to the development of low complexity, iterative MIMO detection. Specifically, we consider two types of MRF, namely, the fully-conne...
Extremal Sparse Polynomial Systems Over Local Fields
Extremal Sparse Polynomial Systems Local Fields
2010/11/23
Consider a system F of n polynomials in n variables, with a total of n+k distinct exponent vectors, over any local field L of characteristic 0. We discuss conjecturally tight upper and lower bounds o...
Henselian valued quasilocal fields with totally indivisible value groups, II
Henselian valued quasilocal fields value groups, II
2010/11/18
This paper characterizes the quasilocal fields from the class of Henselian valued fields with totally indivisible value groups, over which there exist finite separable extensions of nontrivial defect...
Canonical matrices of forms and pairs of forms over finite and p-adic fields
Canonical matrices p-adic fields
2010/11/19
Canonical matrices of (a) bilinear and sesquilinear forms, (b) pairs of forms, in which every form is symmetric or skew-symmetric, and (c) pairs of Hermitian forms are given over finite fields of cha...
Shadowing, expansiveness and stability of divergence-free vector fields
divergence-free vector fields math
2010/11/22
Let X be a divergence-free vector field defined on a closed, connected Riemannian manifold. In this paper, we show the equivalence between the following conditions:
1. X is in the C1-interior of th...
Classification of spatially homogeneous rotating space-times according to their conformal vector fields
Direct integration technique Conformal vector field
2010/9/13
Direct integration technique is used to study non conformally flat spatially homogeneous rotating space-times according to their conformal vector fields. It is shown that the above space-times do not ...
Costas arrays and the extension of Lambert's function on finite fields
Lambert function Costas arrays Golomb rulers
2010/9/13
Motivated by a problem in Costas arrays, we suggest a generalization of Lambert’s W-function in finite fields and study some of its properties.
The convergence of the law of the logarithm involving negatively associated random fields
negatively associated random fields
2010/9/13
In this paper, the convergence of negatively associated random fields is investigated, two sufficiency conditions for the law of the logarithum are obtained by the Rosenthal and maximal Rosenthal ineq...
Proper homothetic vector fields in Bianchi Type-I Space-Time
proper homothetic vector fields direct integration technique
2009/3/2
A study of proper homothetic vector field in Bianchi type-
1 space-times is given by using direct integration technique. Using the
above mentioned technique we show that the above space-times admit
...
Some properties of distinguished vector fields on Riemannian manifolds
vector fields Riemannian pseudo-Riemannian manifolds
2009/2/7
The vector fields play an important role in Riemannian (or pseudo-Riemannian)
manifolds. In literature it is known the concept of covariant cohomology oper-
ator r‹, where r means the Levi-Civi...
Some properties of distinguished vector fields on Riemannian manifolds
vector fields Riemannian and pseudo-Riemannian manifolds
2009/1/12
The vector fields play an important role in Riemannian (or pseudo-Riemannian)
manifolds. In literature it is known the concept of covariant cohomology oper-
ator r‹, where r means the Levi-Civi...
On Space-Times with commutative parings of vector fields
Commutative parings sachs frame Schwarzchild space-time
2009/1/8
Let (M,g) be general space-time and let S be a Sachs frame over M. In this
paper we use the complex vector´ıal formalism constructed in [2]. If hA , (A =
1, 2, 3, 4) are the null vector f...
Proper homothetic vector fields in Bianchi Type-I Space-Time
proper homothetic vector fields direct integration technique
2009/1/7
A study of proper homothetic vector field in Bianchi type-
1 space-times is given by using direct integration technique. Using the
above mentioned technique we show that the above space-times admit
...