首页 > 最新文献

Transactions of A Razmadze Mathematical Institute最新文献

英文 中文
On a result of Bruckner relating to directional linear categorical density in Euclidean plane 关于Bruckner关于欧几里得平面上定向线性范畴密度的结果
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-08-01 DOI: 10.1016/j.trmi.2016.10.002
S. Basu , D. Sen

Bruckner proved that with exception of a set of first category, all other points of any second category set having Baire property in the Euclidean plane are points of directional linear categorical density of the set in almost all directions in the sense of category. In this article, we investigate this result of Bruckner in relation to sets not necessarily having Baire property and with respect to a more general definition of directional linear categorical density frammed after the pattern originally introduced by Wilczyński for linear categorical density.

Bruckner证明了除第一类集合外,在欧几里得平面上任何第二类集合上具有贝尔性质的其他所有点在范畴意义上都是该集合在几乎所有方向上具有方向线性范畴密度的点。在本文中,我们研究了Bruckner关于不一定具有Baire性质的集合的这一结果,以及关于方向线性分类密度的更一般的定义,该定义是在Wilczyński对线性分类密度最初引入的模式之后构建的。
{"title":"On a result of Bruckner relating to directional linear categorical density in Euclidean plane","authors":"S. Basu ,&nbsp;D. Sen","doi":"10.1016/j.trmi.2016.10.002","DOIUrl":"10.1016/j.trmi.2016.10.002","url":null,"abstract":"<div><p>Bruckner proved that with exception of a set of first category, all other points of any second category set having Baire property in the Euclidean plane are points of directional linear categorical density of the set in almost all directions in the sense of category. In this article, we investigate this result of Bruckner in relation to sets not necessarily having Baire property and with respect to a more general definition of directional linear categorical density frammed after the pattern originally introduced by Wilczyński for linear categorical density.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 2","pages":"Pages 131-135"},"PeriodicalIF":0.2,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2016.10.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44379739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
One-dimensional Fourier series of a function of many variables 多变量函数的一维傅里叶级数
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-08-01 DOI: 10.1016/j.trmi.2017.03.001
Omar Dzagnidze
<div><p>It is well known that to each summable in the <span><math><mi>n</mi></math></span>-dimensional cube <span><math><msup><mrow><mrow><mo>[</mo><mo>−</mo><mi>π</mi><mo>,</mo><mi>π</mi><mo>]</mo></mrow></mrow><mrow><mi>n</mi></mrow></msup></math></span> function <span><math><mi>f</mi></math></span> of variables <span><math><msub><mrow><mi>x</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>,</mo><mo>…</mo><mo>,</mo><msub><mrow><mi>x</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span> there corresponds one <span><math><mi>n</mi></math></span>-multiple trigonometric Fourier series <span><math><mi>S</mi><mrow><mo>[</mo><mi>f</mi><mo>]</mo></mrow></math></span> with constant coefficients.</p><p>In the present paper, with the function <span><math><mi>f</mi></math></span> we associate <span><math><mi>n</mi></math></span> one-dimensional Fourier series <span><math><mi>S</mi><msub><mrow><mrow><mo>[</mo><mi>f</mi><mo>]</mo></mrow></mrow><mrow><mn>1</mn></mrow></msub><mo>,</mo><mo>…</mo><mo>,</mo><mi>S</mi><msub><mrow><mrow><mo>[</mo><mi>f</mi><mo>]</mo></mrow></mrow><mrow><mi>n</mi></mrow></msub></math></span>, with respect to variables <span><math><msub><mrow><mi>x</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>,</mo><mo>…</mo><mo>,</mo><msub><mrow><mi>x</mi></mrow><mrow><mi>n</mi></mrow></msub></math></span>, respectively, with nonconstant coefficients and announce the preliminary results. In particular, if a continuous function <span><math><mi>f</mi></math></span> is differentiable at some point <span><math><mi>x</mi><mo>=</mo><mrow><mo>(</mo><msub><mrow><mi>x</mi></mrow><mrow><mn>1</mn></mrow></msub><mo>,</mo><mo>…</mo><mo>,</mo><msub><mrow><mi>x</mi></mrow><mrow><mi>n</mi></mrow></msub><mo>)</mo></mrow></math></span>, then all one-dimensional Fourier series <span><math><mi>S</mi><msub><mrow><mrow><mo>[</mo><mi>f</mi><mo>]</mo></mrow></mrow><mrow><mn>1</mn></mrow></msub><mo>,</mo><mo>…</mo><mo>,</mo><mi>S</mi><msub><mrow><mrow><mo>[</mo><mi>f</mi><mo>]</mo></mrow></mrow><mrow><mi>n</mi></mrow></msub></math></span> converge at <span><math><mi>x</mi></math></span> to the value <span><math><mi>f</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow></math></span>.</p><p>For illustration we consider the well known example of Ch. Fefferman’s function <span><math><mi>F</mi><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>y</mi><mo>)</mo></mrow></math></span> whose double trigonometric Fourier series <span><math><mi>S</mi><mrow><mo>[</mo><mi>F</mi><mo>]</mo></mrow></math></span> diverges everywhere in the sense of Prinsheim. Namely, we establish the simultaneous convergence of the one-dimensional Fourier series <span><math><mi>S</mi><msub><mrow><mrow><mo>[</mo><mi>F</mi><mo>]</mo></mrow></mrow><mrow><mn>1</mn></mrow></msub></math></span> and <span><math><mi>S</mi><msub><mrow><mrow><mo>[</mo><mi>F</mi><mo>]</mo></mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> at almost all points <span><math><mrow><mo>(</mo><mi>x</mi><mo>,</mo><mi>y</mi><mo>)</mo></mrow><mo>∈</mo><
众所周知,对于变量x1,…,xn的n维立方[−π,π]n函数f中的每一个可和函数,都对应一个常系数的n倍三角傅立叶级数S[f]。本文利用函数f,分别将n个关于变量x1,…,xn的一维傅里叶级数S[f]1,…,S[f]n与非常系数联系起来,并公布了初步结果。特别地,如果连续函数f在某点x=(x1,…,xn)处可微,则所有一维傅里叶级数S[f]1,…,S[f]n在x处收敛于f(x)。为了说明,我们考虑著名的费费曼函数F(x,y)的例子,它的二重三角傅立叶级数S[F]在Prinsheim意义上处处发散。也就是说,我们建立了一维傅里叶级数S[F]1和S[F]2在几乎所有点(x,y)∈[−π,π]2到值F(x,y)的同时收敛性。
{"title":"One-dimensional Fourier series of a function of many variables","authors":"Omar Dzagnidze","doi":"10.1016/j.trmi.2017.03.001","DOIUrl":"10.1016/j.trmi.2017.03.001","url":null,"abstract":"&lt;div&gt;&lt;p&gt;It is well known that to each summable in the &lt;span&gt;&lt;math&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt;-dimensional cube &lt;span&gt;&lt;math&gt;&lt;msup&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mo&gt;−&lt;/mo&gt;&lt;mi&gt;π&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mi&gt;π&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msup&gt;&lt;/math&gt;&lt;/span&gt; function &lt;span&gt;&lt;math&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; of variables &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mo&gt;…&lt;/mo&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; there corresponds one &lt;span&gt;&lt;math&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt;-multiple trigonometric Fourier series &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; with constant coefficients.&lt;/p&gt;&lt;p&gt;In the present paper, with the function &lt;span&gt;&lt;math&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; we associate &lt;span&gt;&lt;math&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; one-dimensional Fourier series &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mo&gt;…&lt;/mo&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;, with respect to variables &lt;span&gt;&lt;math&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mo&gt;…&lt;/mo&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt;, respectively, with nonconstant coefficients and announce the preliminary results. In particular, if a continuous function &lt;span&gt;&lt;math&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; is differentiable at some point &lt;span&gt;&lt;math&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;=&lt;/mo&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mo&gt;…&lt;/mo&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;, then all one-dimensional Fourier series &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mo&gt;…&lt;/mo&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mi&gt;n&lt;/mi&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; converge at &lt;span&gt;&lt;math&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;/math&gt;&lt;/span&gt; to the value &lt;span&gt;&lt;math&gt;&lt;mi&gt;f&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt;.&lt;/p&gt;&lt;p&gt;For illustration we consider the well known example of Ch. Fefferman’s function &lt;span&gt;&lt;math&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; whose double trigonometric Fourier series &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/math&gt;&lt;/span&gt; diverges everywhere in the sense of Prinsheim. Namely, we establish the simultaneous convergence of the one-dimensional Fourier series &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;1&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; and &lt;span&gt;&lt;math&gt;&lt;mi&gt;S&lt;/mi&gt;&lt;msub&gt;&lt;mrow&gt;&lt;mrow&gt;&lt;mo&gt;[&lt;/mo&gt;&lt;mi&gt;F&lt;/mi&gt;&lt;mo&gt;]&lt;/mo&gt;&lt;/mrow&gt;&lt;/mrow&gt;&lt;mrow&gt;&lt;mn&gt;2&lt;/mn&gt;&lt;/mrow&gt;&lt;/msub&gt;&lt;/math&gt;&lt;/span&gt; at almost all points &lt;span&gt;&lt;math&gt;&lt;mrow&gt;&lt;mo&gt;(&lt;/mo&gt;&lt;mi&gt;x&lt;/mi&gt;&lt;mo&gt;,&lt;/mo&gt;&lt;mi&gt;y&lt;/mi&gt;&lt;mo&gt;)&lt;/mo&gt;&lt;/mrow&gt;&lt;mo&gt;∈&lt;/mo&gt;&lt;","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 2","pages":"Pages 167-170"},"PeriodicalIF":0.2,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2017.03.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47727646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Harmonic analysis and integral transforms associated with a class of a system of partial differential operators 一类偏微分算子系统的调和分析与积分变换
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-08-01 DOI: 10.1016/j.trmi.2017.01.001
Nawel Alaya , Moncef Dziri

In this work, we consider a generalized system of partial differential operators, we define the related Fourier transform and establish some harmonic analysis results. We also investigate a wide class of integral transforms of Riemann–Liouville type. In particular we give a good estimate of these integrals kernels, inversion formula and a Plancherel theorem for the dual.

本文考虑一个广义的偏微分算子系统,定义了相关的傅里叶变换,并建立了一些谐波分析结果。我们还研究了一类广泛的Riemann-Liouville型的积分变换。特别地,我们给出了这些积分的核值,反演公式和对偶的Plancherel定理。
{"title":"Harmonic analysis and integral transforms associated with a class of a system of partial differential operators","authors":"Nawel Alaya ,&nbsp;Moncef Dziri","doi":"10.1016/j.trmi.2017.01.001","DOIUrl":"10.1016/j.trmi.2017.01.001","url":null,"abstract":"<div><p>In this work, we consider a generalized system of partial differential operators, we define the related Fourier transform and establish some harmonic analysis results. We also investigate a wide class of integral transforms of Riemann–Liouville type. In particular we give a good estimate of these integrals kernels, inversion formula and a Plancherel theorem for the dual.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 2","pages":"Pages 111-130"},"PeriodicalIF":0.2,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2017.01.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49042019","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Unique fixed point results on closed ball for dislocated quasi G-metric spaces 位错准g -度量空间闭球上的唯一不动点结果
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-08-01 DOI: 10.1016/j.trmi.2017.01.002
Abdullah Shoaib , Muhammd Arshad , Tahair Rasham , Mujahid Abbas

The aim of this paper is to introduce the new concept of ordered complete dislocated quasi G-metric space. The notion of dominated mappings is applied to approximate the unique solution of non linear functional equations. In this paper, we find the fixed point results for mappings satisfying the locally contractive conditions on a closed ball in an ordered complete dislocated quasi G-metric space. Our results improve several well known classical results.

引入了有序完全位错拟g -度量空间的新概念。本文应用支配映射的概念来逼近非线性泛函方程的唯一解。在有序完全位错拟g -度量空间中,我们得到了闭球上满足局部收缩条件的映射的不动点结果。我们的结果改进了几个著名的经典结果。
{"title":"Unique fixed point results on closed ball for dislocated quasi G-metric spaces","authors":"Abdullah Shoaib ,&nbsp;Muhammd Arshad ,&nbsp;Tahair Rasham ,&nbsp;Mujahid Abbas","doi":"10.1016/j.trmi.2017.01.002","DOIUrl":"10.1016/j.trmi.2017.01.002","url":null,"abstract":"<div><p>The aim of this paper is to introduce the new concept of ordered complete dislocated quasi <span><math><mi>G</mi></math></span>-metric space. The notion of dominated mappings is applied to approximate the unique solution of non linear functional equations. In this paper, we find the fixed point results for mappings satisfying the locally contractive conditions on a closed ball in an ordered complete dislocated quasi <span><math><mi>G</mi></math></span>-metric space. Our results improve several well known classical results.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 2","pages":"Pages 221-230"},"PeriodicalIF":0.2,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2017.01.002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48841761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 12
Approximation in mean on homogeneous compact spaces 齐次紧空间上的均值逼近
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-08-01 DOI: 10.1016/j.trmi.2017.02.003
Duglas Ugulava

Jackson’s type theorem on approximation of square integrable functions is proved for functions defined on homogeneous spaces with a compact transitive transformation group actions. An example is proved which illustrates the theorem.

对于定义在齐次空间上具有紧传递变换群作用的函数,证明了Jackson关于平方可积函数逼近的类型定理。给出了一个例子来说明该定理。
{"title":"Approximation in mean on homogeneous compact spaces","authors":"Duglas Ugulava","doi":"10.1016/j.trmi.2017.02.003","DOIUrl":"10.1016/j.trmi.2017.02.003","url":null,"abstract":"<div><p>Jackson’s type theorem on approximation of square integrable functions is proved for functions defined on homogeneous spaces with a compact transitive transformation group actions. An example is proved which illustrates the theorem.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 2","pages":"Pages 231-237"},"PeriodicalIF":0.2,"publicationDate":"2017-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2017.02.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43178745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On Robinson’s Energy Delay Theorem 关于罗宾逊能量延迟定理
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-04-01 DOI: 10.1016/j.trmi.2016.12.004
L. Ephremidze , W.H. Gerstacker , I. Spitkovsky

An elementary proof of Robinson’s Energy Delay Theorem on minimum-phase functions is provided. The situation in which the energy conservation property holds for an infinite number of lags is fully described.

给出了最小相函数上鲁滨逊能量延迟定理的一个初等证明。充分描述了能量守恒性质在无限滞后数下保持不变的情况。
{"title":"On Robinson’s Energy Delay Theorem","authors":"L. Ephremidze ,&nbsp;W.H. Gerstacker ,&nbsp;I. Spitkovsky","doi":"10.1016/j.trmi.2016.12.004","DOIUrl":"10.1016/j.trmi.2016.12.004","url":null,"abstract":"<div><p>An elementary proof of Robinson’s Energy Delay Theorem on minimum-phase functions is provided. The situation in which the energy conservation property holds for an infinite number of lags is fully described.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 1","pages":"Pages 16-23"},"PeriodicalIF":0.2,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2016.12.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44838067","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Abstract formulations of some theorems on nonmeasurable sets 不可测集上一些定理的抽象表述
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-04-01 DOI: 10.1016/j.trmi.2017.01.003
S. Basu , D. Sen

Here we give abstract formulations of some generalized versions of the classical Vitali theorem on Lebesgue nonmeasurable sets which are due to Kharazishvili and Solecki.

本文给出了由Kharazishvili和Solecki给出的Lebesgue不可测集的经典Vitali定理的一些广义形式的抽象表述。
{"title":"Abstract formulations of some theorems on nonmeasurable sets","authors":"S. Basu ,&nbsp;D. Sen","doi":"10.1016/j.trmi.2017.01.003","DOIUrl":"10.1016/j.trmi.2017.01.003","url":null,"abstract":"<div><p>Here we give abstract formulations of some generalized versions of the classical Vitali theorem on Lebesgue nonmeasurable sets which are due to Kharazishvili and Solecki.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 1","pages":"Pages 10-15"},"PeriodicalIF":0.2,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2017.01.003","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41752856","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Sobolev regularity of the Bergman projection on certain pseudoconvex domains 伪凸域上Bergman投影的Sobolev正则性
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-04-01 DOI: 10.1016/j.trmi.2016.10.004
Sayed Saber

In this paper we study the Sobolev regularity of the Bergman projection B and the ¯-Neumann operator N on a certain pseudoconvex domain. We show that if Ω is a domain with Lipschitz boundary, which is relatively compact in an n-dimensional compact Kähler manifold and satisfies some “logδ-pseudoconvexity” condition, the operators B, N and ¯N are regular in the Sobolev spaces Wr,sk(Ω,E) for forms with values in a holomorphic vector bundle E and for any k<η/2, 0<η<1, 0rn, 0sn1.

本文研究了某伪凸域上Bergman投影B和∂¯-Neumann算子N的Sobolev正则性。我们证明了如果Ω是一个具有Lipschitz边界的域,该域在N维紧致Kähler流形中是相对紧致的,并且满足某些“logδ-伪凸性”条件,那么对于值在全纯向量束E中的形式和对于任意k<η/2, 0<η< 1,0≤r≤N, 0≤s≤N - 1,算子B, N和∂¯∗N在Sobolev空间Wr,sk(Ω,E)中是正则的。
{"title":"Sobolev regularity of the Bergman projection on certain pseudoconvex domains","authors":"Sayed Saber","doi":"10.1016/j.trmi.2016.10.004","DOIUrl":"10.1016/j.trmi.2016.10.004","url":null,"abstract":"<div><p>In this paper we study the Sobolev regularity of the Bergman projection <span><math><mi>B</mi></math></span> and the <span><math><mover><mrow><mi>∂</mi></mrow><mo>¯</mo></mover></math></span>-Neumann operator <span><math><mi>N</mi></math></span> on a certain pseudoconvex domain. We show that if <span><math><mi>Ω</mi></math></span> is a domain with Lipschitz boundary, which is relatively compact in an <span><math><mi>n</mi></math></span>-dimensional compact Kähler manifold and satisfies some “<span><math><mo>log</mo><mspace></mspace><mi>δ</mi></math></span>-pseudoconvexity” condition, the operators <span><math><mi>B</mi></math></span>, <span><math><mi>N</mi></math></span> and <span><math><msup><mrow><mover><mrow><mi>∂</mi></mrow><mo>¯</mo></mover></mrow><mrow><mo>∗</mo></mrow></msup><mi>N</mi></math></span> are regular in the Sobolev spaces <span><math><msubsup><mrow><mi>W</mi></mrow><mrow><mi>r</mi><mo>,</mo><mi>s</mi></mrow><mrow><mi>k</mi></mrow></msubsup><mrow><mo>(</mo><mi>Ω</mi><mo>,</mo><mi>E</mi><mo>)</mo></mrow></math></span> for forms with values in a holomorphic vector bundle <span><math><mi>E</mi></math></span> and for any <span><math><mi>k</mi><mo>&lt;</mo><mi>η</mi><mo>/</mo><mn>2</mn></math></span>, <span><math><mn>0</mn><mo>&lt;</mo><mi>η</mi><mo>&lt;</mo><mn>1</mn></math></span>, <span><math><mn>0</mn><mo>≤</mo><mi>r</mi><mo>≤</mo><mi>n</mi></math></span>, <span><math><mn>0</mn><mo>≤</mo><mi>s</mi><mo>≤</mo><mi>n</mi><mo>−</mo><mn>1</mn></math></span>.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 1","pages":"Pages 90-102"},"PeriodicalIF":0.2,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2016.10.004","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42588369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Investigation and numerical solution of some 3D internal Dirichlet generalized harmonic problems in finite domains 有限域中三维内Dirichlet广义调和问题的研究与数值解
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-04-01 DOI: 10.1016/j.trmi.2016.11.001
Mamuli Zakradze , Murman Kublashvili , Zaza Sanikidze , Nana Koblishvili

A Dirichlet generalized harmonic problem for finite right circular cylindrical domains is considered. The term “generalized” indicates that a boundary function has a finite number of first kind discontinuity curves. It is shown that if a finite domain is bounded by several surfaces and the curves are placed in arbitrary form, then the generalized problem has a unique solution depending continuously on the data. The problem is considered for the simple case when the curves of discontinuity are circles with centers situated on the axis of the cylinder. An algorithm of numerical solution by a probabilistic method is given, which in its turn is based on a computer simulation of the Wiener process. A numerical example is considered to illustrate the effectiveness and simplicity of the proposed method.

研究有限右圆柱域上的Dirichlet广义调和问题。“广义”一词表示边界函数具有有限条第一类不连续曲线。证明了如果一个有限域被若干曲面所包围,且曲线以任意形式放置,则广义问题具有连续依赖于数据的唯一解。考虑了不连续曲线为圆心位于圆柱体轴线上的圆的简单情况。在计算机模拟维纳过程的基础上,给出了一种概率方法的数值求解算法。算例说明了该方法的有效性和简便性。
{"title":"Investigation and numerical solution of some 3D internal Dirichlet generalized harmonic problems in finite domains","authors":"Mamuli Zakradze ,&nbsp;Murman Kublashvili ,&nbsp;Zaza Sanikidze ,&nbsp;Nana Koblishvili","doi":"10.1016/j.trmi.2016.11.001","DOIUrl":"10.1016/j.trmi.2016.11.001","url":null,"abstract":"<div><p>A Dirichlet generalized harmonic problem for finite right circular cylindrical domains is considered. The term “generalized” indicates that a boundary function has a finite number of first kind discontinuity curves. It is shown that if a finite domain is bounded by several surfaces and the curves are placed in arbitrary form, then the generalized problem has a unique solution depending continuously on the data. The problem is considered for the simple case when the curves of discontinuity are circles with centers situated on the axis of the cylinder. An algorithm of numerical solution by a probabilistic method is given, which in its turn is based on a computer simulation of the Wiener process. A numerical example is considered to illustrate the effectiveness and simplicity of the proposed method.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 1","pages":"Pages 103-110"},"PeriodicalIF":0.2,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2016.11.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41551985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
Recursive estimation procedures for one-dimensional parameter of statistical models associated with semimartingales 半鞅统计模型一维参数的递归估计方法
IF 0.2 Q4 MATHEMATICS Pub Date : 2017-04-01 DOI: 10.1016/j.trmi.2016.12.001
Nanuli Lazrieva, Temur Toronjadze

The recursive estimation problem of a one-dimensional parameter for statistical models associated with semimartingales is considered. The asymptotic properties of recursive estimators are derived, based on the results on the asymptotic behavior of a Robbins–Monro type SDE. Various special cases are considered.

研究了半鞅统计模型一维参数的递归估计问题。基于Robbins-Monro型SDE的渐近性质,导出了递推估计量的渐近性质。考虑了各种特殊情况。
{"title":"Recursive estimation procedures for one-dimensional parameter of statistical models associated with semimartingales","authors":"Nanuli Lazrieva,&nbsp;Temur Toronjadze","doi":"10.1016/j.trmi.2016.12.001","DOIUrl":"10.1016/j.trmi.2016.12.001","url":null,"abstract":"<div><p>The recursive estimation problem of a one-dimensional parameter for statistical models associated with semimartingales is considered. The asymptotic properties of recursive estimators are derived, based on the results on the asymptotic behavior of a Robbins–Monro type SDE. Various special cases are considered.</p></div>","PeriodicalId":43623,"journal":{"name":"Transactions of A Razmadze Mathematical Institute","volume":"171 1","pages":"Pages 57-75"},"PeriodicalIF":0.2,"publicationDate":"2017-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/j.trmi.2016.12.001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47223792","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
期刊
Transactions of A Razmadze Mathematical Institute
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1