共查询到10条相似文献,搜索用时 140 毫秒
1.
M. M. Cavalcanti V. N. Domingos Cavalcanti J. A. Soriano L. A. Medeiros 《Southeast Asian Bulletin of Mathematics》2000,24(2):183-199
In this paper, we study a hyperbolic model based on the equation
with nonlinear boundary conditions given by
.We prove the existence and the uniqueness of global solutions. Also, we obtain the uniform decay of the energy without control of its derivative sign.AMS Subject Classification (2000), 35L05, 35L70, 35B40 相似文献
2.
In this note we show that the equational theory of all lattices is defined by the
single absorption law
This identity of length 29 with 8 variables is shorter than previously known such equations
defining lattices. 相似文献
3.
4.
Qiulan Qi Shunsheng Guo Zhanjie Song Lixia Liu 《Southeast Asian Bulletin of Mathematics》2003,26(2):321-329
For linear combinations of Gamma operators Gn,r(f,x), we give an equivalent theorem with
(f,t), where
(f,t) are the Ditzian-Totik moduli of smoothness (
).AMS Subject Classification (1991): 41A25, 41A36.Supported by NSF of Hebei ProvinceSupported by NSF of Hebei Province 相似文献
5.
Let p be a prime, G
a finite group which has a normal p-subgroup
containing its own centralizer in G, and
R a commutative local ring with residue class
field of characteristic p. In this paper, it is
shown that if
is an augmented automorphism of
RG which fixes a Sylow
p-subgroup P
of G, there is
such that
for all
and
is an inner automorphism of
RG.
Received: 26 July 2000 相似文献
6.
Let S be a real interval with
, and
be a function satisfying
We show that if h is Lebesgue or Baire measurable, then there
exists
such that
That result is motivated by a question of E. Manstaviius.
Received: 11 February 2003 相似文献
7.
Omar Anza Hafsa Jean-Philippe Mandallena 《Annali di Matematica Pura ed Applicata》2007,186(1):185-196
Consider a plate occupying in a reference configuration a bounded open set Ω ⊂ ℝ
2
, and let
be its stored-energy function. In this paper we are concerned with relaxation of variational problems of type:
, where
with
is the scalar product in ℝ
3
and
is the external loading per unit surface. We take into account the fact that an infinite amount of energy is required to compress
a finite surface of the plate into zero surface, i.e.,
Mathematics Subject Classification (2000) 49J45 相似文献
8.
A set of linear maps
, V a finite vector space over a field K, is regular if to each
there corresponds a unique element
such that R(x)=y. In this context, Schur’s lemma implies that
is a field if (and only if) it consists of pairwise commuting elements. We consider when
is locally commutative: at some μ ∈V*, AB(μ)=BA(μ) for all
, and
has been normalized to contain the identity. We show that such locally commutative
are equivalent to commutative semifields, generalizing a result of Ganley, and hence characterizing commutative semifield spreads within the class of translation planes. This enables the determination of the orders |V| for which all locally commutative
on V are (globally) commutative. Similarly, we determine a sharp upperbound for the maximum size of the Schur kernel associated with strictly locally commutative
. We apply our main result to demonstrate the existence of a partial spread of degree 5, with nominated shears axis, that cannot be extend to a commutative semifield spread. Finally, we note that although local commutativity for a regular linear set
implies that the set of Lie products
consists entirely of singular maps, the converse is false. 相似文献
9.
A function
is said to be completely monotonic if
for all x > 0 and n = 0,1,2,.... In this paper we present several new classes of completely monotonic functions. Our functions have in common
that they are defined in terms of the classical gamma, digamma, and polygamma functions. Moreover, we apply one of our monotonicity
theorems to prove a new inequality for prime numbers. Some of the given results extend and complement theorems due to Bustoz
& Ismail, Clark & Ismail, and other researchers.
2000 Mathematics Subject Classification Primary—11A41, 26A48, 33B15; Secondary—26D15 相似文献
10.
Imre Kocsis 《Aequationes Mathematicae》2007,73(3):280-284