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Portal Hypertension & Cirrhosis 2023年第1期2卷 I0003-I0026页

1.SUBMISSION Thank you for your interest in Portal Hypertension&Cirrhosis(PH&C).Note that submission implies that the content has not been published or submitted for publication elsewhere except as a brief abstract in... 详细信息

关键词： implies content submitted

ON AN INVERSE THEOREM OF APPROXIMATION

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Chinese Annals of Mathematics,Series B 1991年第2期12卷 219-229页

作者：杨力华 Department of Mathematics Hunan Normal UniversityChangshaHunanChina

The author gives some disagreement to the following result,which is published in [1].Let {Ln(f(}be mass-concerntative,φn→0+（n→∞）,0-1≤（φn+1）/（φn）≤C（n=1,2,…）for some constrant C>0.Then for any f∈C[-2a,2a],||Ln（f）-f||σ[-a,a]=O（φnα）implies f∈Lip*α,whereLip*a={f∈C[-2a,2a]|w2（f,δ）[-2a,2a]=O（δα）}.Then some similar results on C2πare given,and further some results on C[-2a,2a]areestablished by adding some proper conditions.

关键词： implies adding opera proof details inverse 知一 lemma rally 优一

A NOTE ON WEAKLY PRIMITIVE RINGS

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Chinese Annals of Mathematics,Series B 1991年第2期12卷 207-212页

作者：郭善良 Institute of Mathematics Fudan UniversityShanghaiChina.

It is well known that,for a subring of a full linear ring over a vector spaec,2-foldtransitive implies k-fold transitive for every natual integer k,and a primitive ring withminimal oneside ideal is a two side nonsingular ring and every isomorphism can be inducedby a semi-linear one to one transformation.This paper generalizes these results to weaklyprimitive rings.

关键词： integer rings implies primitive nonzero lemma densely unless kernel 二尹

HANKEL OPERATORS ON HARDY SPACES AND SCHATTEN CLASSES

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Chinese Annals of Mathematics,Series B 1991年第3期12卷 282-294页

作者：张根凯 Institute of Mathematics Fudam University Shanghai China.

For a holomorphic function f on the unit ball B^N of C^N, it is proved that the reduced Hankel oporator R_f on Hardy space H^2(B^N) is of Schatten class S_p for p≥1 if and only if f is in a corresponding Sobolev space.

关键词： CLASSES normalized dense holomorph implies Gleason giving 石瓜 polynomial opera

CONSTRUCTIONS OF POWER BASES OF CYCLOTOMIC FIELDS

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Chinese Annals of Mathematics,Series B 1992年第2期13卷 244-250页

作者：罗承辉 Department of Mathematics University of Science and Technology of China Hefei Anhui 340036 China

Suppose Q（ζm） is the m-th cyclotomic number field, where ζm is an m-th primitive root of unity, m>1 any integer. Let am=ζm+ζm2+...+ζm（m-1）/2 if m is odd and let βm be the product of the integersl-ζm（1m and βm generate power bases of Q（ζm）, i. e., Z [am]= Z[βm]+Z[ζm]. The author also conjectures that there is no other power basis generator except ζm up to equivalence, and proves that this is the case when m=8, 9 and 12. The corresponding result for m=p an odd prime was also obtained by A. Bremner with a different method.

关键词： equivalence integer generator bases primitive implies impossible valent 汉月云才

QUASI PERIODIC SOLUTIONS OF NEUTRAL VOLTERRA INTEGRAL DIFFERENTIAL EQUATIONS WITH INFINITE DELAY

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Chinese Annals of Mathematics,Series B 1991年第2期12卷 157-163页

作者：王克 Department of Mathematics Northeast Normal UniversityChangchunJilinChina

This paper deals with the uniqueness,existence and non-existence of quasi periodicsolutions of neutral Volterra integral differential equations of the form(1)and(2)Some new unique existence criteria and non-existence ... 详细信息

关键词： uniqueness Volterra neutral deals quasi normed implies 钟邵 milar holds

ON PP TYPE ESTIMATED KOLMOGOROV STATISTICS

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Chinese Annals of Mathematics,Series B 1992年第3期13卷 280-288页

作者：朱力行成平 Institute of Applied Mathematics Academia SinicaBeijing 100080China. Institute of Sys tern Sciences Academia SinicaBeijing 100080China.

The authors construct PP type estimated Kolmogorov statistics by Projection Pursuittechnique to deal with simultaneously the sparseness of sample points in high-dimensionalspace and the case that distribution occupies the unknown location parameter and disper-sion matrix.Furthermore,the tali behavior of the limit of the statistics is investigated.

关键词： Kolmogorov argument symmetry spher Adler 帕阿 subset implies uniformly differentiable

UNIQUENESS OF SOLUTIONS FOR HIGHER DIMENSIONAL QUASILINEAR DEGENERATE PARABOLIC EQUATION

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Chinese Annals of Mathematics,Series B 1992年第2期13卷 129-136页

作者：赵俊宁 Institute of Mathematics Jilin University Changchun Jilin 130023 China

This paper studies the uniqueness of generalized solutions for the first boundary value problem of the form where A_u≥0.It is proved that if u∈BV_x(Q_T) and A(u, x, t) is strictly increasing with respect to u, the s... 详细信息

关键词： uniqueness strictly degenerate measurable 加名云一 implies Jilin 八甲 analogous

THE REGULARITY OF SOLUTIONS FOR NONLINEAR DEGENERATE ELLIPTIC BOUNDARY VALUE PROBLEM

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Chinese Annals of Mathematics,Series B 1990年第3期11卷 330-341页

作者：洪家兴 Institute of Mathematics Fudan University

This paper is devoted lo the study of regularity of solutions for Dirichlet probelm ofnonlinear degenerate elliptic equations in two dimensional case. A sufficient condition fortheir solutions in C3+α（Ω） to be cer... 详细信息

关键词： regularity elliptic degenerate devoted Dirichlet proof Nirenberg grateful implies milar