{"title":"具有给定连续混合模主量的多变量周期函数类的逼近","authors":"O. Fedunyk-Yaremchuk, S. Hembars’ka","doi":"10.15330/cmp.13.3.838-850","DOIUrl":null,"url":null,"abstract":"In this paper, we continue the study of approximation characteristics of the classes $B^{\\Omega}_{p,\\theta}$ of periodic functions of several variables whose majorant of the mixed moduli of continuity contains both exponential and logarithmic multipliers. We obtain the exact-order estimates of the orthoprojective widths of the classes $B^{\\Omega}_{p,\\theta}$ in the space $L_{q},$ $1\\leq p<q<\\infty,$ and also establish the exact-order estimates of approximation for these classes of functions in the space $L_{q}$ by using linear operators satisfying certain conditions.","PeriodicalId":42912,"journal":{"name":"Carpathian Mathematical Publications","volume":"30 1","pages":""},"PeriodicalIF":1.0000,"publicationDate":"2021-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Approximation of classes of periodic functions of several variables with given majorant of mixed moduli of continuity\",\"authors\":\"O. Fedunyk-Yaremchuk, S. Hembars’ka\",\"doi\":\"10.15330/cmp.13.3.838-850\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"In this paper, we continue the study of approximation characteristics of the classes $B^{\\\\Omega}_{p,\\\\theta}$ of periodic functions of several variables whose majorant of the mixed moduli of continuity contains both exponential and logarithmic multipliers. We obtain the exact-order estimates of the orthoprojective widths of the classes $B^{\\\\Omega}_{p,\\\\theta}$ in the space $L_{q},$ $1\\\\leq p<q<\\\\infty,$ and also establish the exact-order estimates of approximation for these classes of functions in the space $L_{q}$ by using linear operators satisfying certain conditions.\",\"PeriodicalId\":42912,\"journal\":{\"name\":\"Carpathian Mathematical Publications\",\"volume\":\"30 1\",\"pages\":\"\"},\"PeriodicalIF\":1.0000,\"publicationDate\":\"2021-12-30\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Carpathian Mathematical Publications\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.15330/cmp.13.3.838-850\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Carpathian Mathematical Publications","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.15330/cmp.13.3.838-850","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATHEMATICS","Score":null,"Total":0}
Approximation of classes of periodic functions of several variables with given majorant of mixed moduli of continuity
In this paper, we continue the study of approximation characteristics of the classes $B^{\Omega}_{p,\theta}$ of periodic functions of several variables whose majorant of the mixed moduli of continuity contains both exponential and logarithmic multipliers. We obtain the exact-order estimates of the orthoprojective widths of the classes $B^{\Omega}_{p,\theta}$ in the space $L_{q},$ $1\leq p