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1.
Existence and uniqueness of a doubly -derived translation plane of order 49 are proved. Furthermore, we give a complete classification of those translation planes of order 49 which can be obtained from the desarguesian plane of order 49 by a mixed double derivation, namely by applying a -derivation on and a classical derivation (also called Ostrom's derivation or -derivation) on . 相似文献
2.
In this note, we characterize the regular probability measures satisfying the Choquet-Deny convolution equation =* on Abelian topological semigroups for a given probability measure . 相似文献
3.
4.
Like dismantling for finite posets, a perfect sequence = P
: of a chain complete posetP represents a canonical procedure to produce a coreP
. It has been proved that if the posetP contains no infinite antichain then this coreP
is a retract ofP andP has the fixed point property iffP
has this property. In this paper the condition of having no infinite antichain is replaced by a weaker one. We show that the same conclusion holds under the assumption thatP does not contain a one-way infinite fence or a tower.Supported by a grant from The National Natural Science Foundation of China. 相似文献
5.
J. Mogyoródi 《Analysis Mathematica》1981,7(3):185-197
, , . . . [1], , . , , ., , L logL. , , . . . . [5]. , . 相似文献
6.
Tassilo Küpper 《Numerische Mathematik》1976,25(2):201-214
Summary For differential operatorsM of second order (as defined in (1.1)) we describe a method to prove Range-Domain implications—Mu–u and an algorithm to construct these functions , , , . This method has been especially developed for application to non-inverse-positive differential operators. For example, for non-negativea
2 and for given functions = we require =C
0[0, 1] C
2([0, 1]–T) whereT is some finite set), (M) (t)(t), (t[0, 1]–T) and certain additional conditions for eachtT. Such Range-Domain implications can be used to obtain a numerical error estimation for the solution of a boundary value problemMu=r; further, we use them to guarantee the existence of a solution of nonlinear boundary value problems between the bounds- and . 相似文献
7.
[4] , . 相似文献
8.
9.
10.
A. V. Tushev 《Ukrainian Mathematical Journal》1991,43(7-8):975-981
We prove that if M is a Noether JG-module, where G is an abelian group of finite free rank, and either J=, or J=Ft, where F is a finite field and t is an infinite cyclic group, then the module M belongs to a class
(J, ) for some finite set in the sense defined by P. Hall.Translated from Ukrainskii Matematicheskii Zhurnal, Vol. 43, Nos. 7 and 8, pp. 1042–1048, July–August, 1991. 相似文献
11.
12.
Exact estimates for partially monotone approximation 总被引:2,自引:0,他引:2
G. L. Iliev 《Analysis Mathematica》1978,4(3):181-197
f(x) — , - [–1,1], (f, ) — , as— f, . . (- ) (x
i,x
i+ 1) (i=0, 1, ...,s–1; =–1,x
s,=1), f(x) . , n=0,1,...
n() , [– 1,1] signf(x) sign
n(x) 0, ¦f(x)–
n(x)¦ C(s) (f, 1/n+1, C(s) s. , - , « » . 相似文献
13.
Klaus Böhmer 《Numerische Mathematik》1981,37(2):167-192
Summary In this paper we present a general theory for discrete Newton methods, iterated defect corrections via neighbouring problems and deferred corrections based on asymptotic expansions of the discretization error.Dedicated to Professor Dr. J. Weisinger on the occasion of his sixty-fifth birthday 相似文献
14.
We obtain the analytic expression for the total cross section of the reaction e
–
e
+l
–
l
+ (l=,) taking possible quasianapole interaction effects into account. We find numerical restrictions on the interaction parameter value from data for the reaction e
–
e
+–+ in the energy domain below the Z
0 peak. 相似文献
15.
E. A. Riss 《Journal of Mathematical Sciences》1992,61(1):1907-1911
The fundamental result: if and v are two finite Borel measures, defined in the spaceL
p[0, 1] (1p<) or in C(K) (K is a metric compactum without isolated points), then from the equalities (B)=v(B) for all balls B of radius 1 there follows that =v. In addition, in the spaces C(K) and p (1p<) from the inequalities (B) v(B) there follows that v.Translated from Zapiski Nauchnykh Seminarov Leningradskogo Otdeleniya Matematicheskogo Instituta im. V. A. Steklova Akademii Nauk SSSR, Vol. 177, pp. 122–128, 1989. 相似文献
16.
The Dual of the martingale Hardy space ℋΦ with general Young function Φwith general Young function Φ
Bui Khoi Dam 《Analysis Mathematica》1988,14(4):287-294
[10], 1 . [4] K
q-, , 1p2 pp K
q, q=p/p–1)(q=+, p=1 K
= ). — p ⊃<<. , , , — , K
. , ( ) , q . 相似文献
17.
Tassilo Küpper 《manuscripta mathematica》1978,26(3):259-291
For a linear fourth order ordinary differential operator M we study Range Domain Implications (RDI). Let Co [O,1] be positive; we show under what conditions there exists a CO[O,1] such that the following RDI holds: Mu(x) (x) (0x1) u(x) (0x1). In particular we provide a numerical procedure to calculate .RDI are used to obtain error estimations and to solve related nonlinear problems.The basic idea to prove RDI is to split M into a product of second order differential operators which are easier to handle. For the general case that there exists no global splitting the concept of a local splitting is introduced.
The author would like to thank the European Research Office of the United States Army for their kind interest. 相似文献
The author would like to thank the European Research Office of the United States Army for their kind interest. 相似文献
18.
We study the lower semicontinuous envelope in Lp(), F, of a functional F of the form F(u)=A uudx where A=A(x) is not strictly elliptic and not bounded. We prove that F; may also be written as F;(u)= Buudx with B=AP A for a matrix P which is the matrix of an orthogonal projection. In the one-dimensional case, we characterize the domain of F and we explicit the matrix P. 相似文献
19.
F. Schipp 《Analysis Mathematica》1990,16(2):135-141
H={h
1,I } — , . : , I ¦(I)¦=¦I¦, ¦I¦ — I. H H
={h
(I),I} . , , . L
p
.
Dedicated to Professor B. Szökefalvi-Nagy on his 75th birthday
This research was supported in part by MTA-NSF Grants INT-8400708 and 8620153. 相似文献
Dedicated to Professor B. Szökefalvi-Nagy on his 75th birthday
This research was supported in part by MTA-NSF Grants INT-8400708 and 8620153. 相似文献
20.
Michael Lin 《Probability Theory and Related Fields》1981,55(2):231-236
Summary Let P be a Markov operator on L
(X, , m). Theorem 1: (i) P is weakly mixing (ii) For every fL
there is a sequence {nt} of density 1 such that all w
*-cluster points of
are constants (iii) For every fL
there is a {kj} with
w
*-convergent to a constant. Theorem 2: If P is induced by a non-singular transformation , P is weakly mixing For every A, {
–n(A)} has a remotely trivial subsequence. The existence of a finite invariant measure is not required in these results. 相似文献