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Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics最新文献

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On invariant submanifolds of paracompact (k;m)-spaces 准紧(k;m)-空间的不变子流形
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.13
S. Ghosh, A. Sarkar
{"title":"On invariant submanifolds of paracompact (k;m)-spaces","authors":"S. Ghosh, A. Sarkar","doi":"10.31926/but.mif.2020.13.62.2.13","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.13","url":null,"abstract":"The object of the present paper is to deduce some necessary and sufficient conditions for invariant Submanifolds of paracontact (κ, µ)-spaces to be totally geodesic. We also establish that a totally umbilical invariant submanifold of a paracontact (κ, µ)-manifold is also totally geodesic. Some more necessary and sufficient conditions for a submanifold of a paracontact (κ, µ)-manifold to be totally geodesic have been deduced using parallelity and pseudo parallelity of the second fundamental form. In the last section we obtain some results on paracontact (κ, µ)-manifold with concircular canonical field.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"139 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77988189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Results on uniqueness of entire functions related to differential-difference polynomial 关于微分-差分多项式整函数唯一性的结果
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.19
S. Majumder, Jeet Sarkar
{"title":"Results on uniqueness of entire functions related to differential-difference polynomial","authors":"S. Majumder, Jeet Sarkar","doi":"10.31926/but.mif.2020.13.62.2.19","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.19","url":null,"abstract":"In the paper, we use the idea of normal family to investigate the uniqueness problems of entire functions when certain types of differential-difference polynomials generated by them sharing a non-zero polynomial. Also we exhibit one example to show that the conditions of our results are the best possible.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75939596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Subclass of analytic functions associated with Pascal distribution series 与Pascal分布级数相关的解析函数的子类
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.11
B. Frasin, G. Murugusundaramoorthy, S. Yalçın
{"title":"Subclass of analytic functions associated with Pascal distribution series","authors":"B. Frasin, G. Murugusundaramoorthy, S. Yalçın","doi":"10.31926/but.mif.2020.13.62.2.11","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.11","url":null,"abstract":"In this paper, we find the necessary and sufficient conditions and inclusion relations for Pascal distribution series to be in the classes Wδ(α, γ, β) of analytic functions. Further, we consider an integral operator related to Pascal distribution series. Several corollaries and consequences of the main results are also considered.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"29 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85052134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
A novel epidemic model to analyze and control the chaotic behavior of COVID-19 outbreak. 一种分析和控制COVID-19暴发混沌行为的新型流行病模型。
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.9
Renu Chugh, Amit Kumar, S. Kumari
{"title":"A novel epidemic model to analyze and control the chaotic behavior of COVID-19 outbreak.","authors":"Renu Chugh, Amit Kumar, S. Kumari","doi":"10.31926/but.mif.2020.13.62.2.9","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.9","url":null,"abstract":"The coronavirus disease 2019 (COVID-19) has been spread all over the world. There are more than 43.14 million COVID-19 confirmed cases and over 1.15 million deaths reported worldwide till October 26, 2020. As the proper treatment/vaccine is not available, most of the countries are relying on various preventive measures to check the spread of epidemic. The aim of this article is to analyze the impact of corona preventive measures on the spread of COVID-19 by employing a novel epidemic model. Moreover, time series and bifurcation analysis techniques have been used to estimate this impact. To prove the validity of our model, we apply our model on highly affected countries such as China, Italy, USA, UK and India. Our findings might be very useful tool for decision holders and policy makers to take the right decisions in a timely way to control the outbreak of COVID-19, knowing the uncertainties about the coronovirus disease. We show a good agreement between the reported data and the estimations given by our model.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79990346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
A note on C. C. Yang's question corresponding to linear shift operator. 关于线性移位算子对应的杨正昌问题的注记。
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.5
A. Banerjee, A. Roy
{"title":"A note on C. C. Yang's question corresponding to linear shift operator.","authors":"A. Banerjee, A. Roy","doi":"10.31926/but.mif.2020.13.62.2.5","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.5","url":null,"abstract":"In this paper, we investigate shared value problems of finite ordered meromorphic functions with the linear shift operators governed by them, which practically provide an answer to Yang’s question. We exhibit a number of examples which will justify some assertions in the paper. Based on some examples relevant with the discussion, we also place a question in the penultimate section for future research.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81443403","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
LAPACK library for mathematical modeling used in 3D object reconstruction LAPACK库用于三维对象重建的数学建模
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.27
Bianca Lixandru, V. Monescu
{"title":"LAPACK library for mathematical modeling used in 3D object reconstruction","authors":"Bianca Lixandru, V. Monescu","doi":"10.31926/but.mif.2020.13.62.2.27","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.27","url":null,"abstract":"Over time, multiple solutions have been sought for building 3D models in the fastest and most accurate way possible. For this reason, this article proposes the use of LAPACK library for a quick solution of linear systems generated by least square method calculation. A mathematical and physical component used in the reconstruction of models consists in the use of Spherical Harmonics which represent some special functions often used in solving partial differential equations in different scientific areas. This problem finds its place in multiple domains such as medicine, engineering, programming. The target of the work described by this paper is to achieve optimization in the reconstruction of 3D models. We aim to perform real-time model reconstruction for large data sets by using Spherical Harmonics functions.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"48 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81937037","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Certain subclass of bi-univalent functions associated with the Chebyshev polynomials based on q-derivative symmetric q-derivative 基于q-导数对称q-导数的与Chebyshev多项式相关的双一价函数的某些子类
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.18
N. Magesh, A. Motamednezhad, S. Salehian
{"title":"Certain subclass of bi-univalent functions associated with the Chebyshev polynomials based on q-derivative symmetric q-derivative","authors":"N. Magesh, A. Motamednezhad, S. Salehian","doi":"10.31926/but.mif.2020.13.62.2.18","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.18","url":null,"abstract":"In this paper, we introduce new subclass Beq σB (λ, t) of bi-univalent functions by applying the Chebyshev polynomials. In the following, we obtain bounds for the initial coefficients and the Fekete-Szeg¨o inequalities for functions in this subclass. The results presented in this paper generalize the recent work of Altinkaya and Yalcın.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"73 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85121889","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
On representation of a first degree spline function 关于一次样条函数的表示
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.23
E. Scheiber
{"title":"On representation of a first degree spline function","authors":"E. Scheiber","doi":"10.31926/but.mif.2020.13.62.2.23","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.23","url":null,"abstract":"A presentation of related global representations for the first degree spline function is given, revisiting some known results. The given global representations are deduced one from another by simple transformations.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77093532","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Caputo-Fabrizio fractional differential equations in Frechet spaces Frechet空间中的Caputo-Fabrizio分数阶微分方程
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.1
S. Abbas, M. Benchohra, Hafsa Gorine
{"title":"Caputo-Fabrizio fractional differential equations in Frechet spaces","authors":"S. Abbas, M. Benchohra, Hafsa Gorine","doi":"10.31926/but.mif.2020.13.62.2.1","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.1","url":null,"abstract":"This paper deals with some existence and uniqueness of solutions for a class of functional Caputo-Fabrizio fractional differential equations. Some applications are made of a generalization of the classical Darbo fixed point theorem for Frechet spaces associate with the concept of measure of noncompactness. The last section illustrates our results with some examples.","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73817170","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
On forward iterated Hausdorffness and development of embryo from zygote in bitopological dynamical systems 生物形态学动力系统中受精卵的正向迭代豪斯多夫性与胚胎发育
Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics Pub Date : 2021-01-20 DOI: 10.31926/but.mif.2020.13.62.2.3
Santanu Acharjee, K. Goswami, H. Sarmah
{"title":"On forward iterated Hausdorffness and development of embryo from zygote in bitopological dynamical systems","authors":"Santanu Acharjee, K. Goswami, H. Sarmah","doi":"10.31926/but.mif.2020.13.62.2.3","DOIUrl":"https://doi.org/10.31926/but.mif.2020.13.62.2.3","url":null,"abstract":"Topological dynamical system is an area of dynamical system to investigate dynamical properties in terms of a topological space. Nada and Zohny [Nada, S.I. and Zohny, H., An application of relative topology in biology, Chaos, Solitons and Fractals. 42 (2009), 202-204] applied topological dynamical system to explore the development process of an embryo from the zygote until birth and made three conjectures. In this paper, we disprove conjecture 3 of Nada and Zohny [Nada, S.I. and Zohny, H., An application of relative topology in biology, Chaos, Solitons and Fractals. 42 (2009), 202-204] by applying some of our mathematical results of bitopological dynamical system. Also, we introduce forward iterated Hausdorff space, backward iterated Hausdorff space, pairwise iterated Hausdor_ space and establish relations between them in bitopological dynamical system. We formulate the function that represents cell division (specially, mitosis) and using this function we show that in the development process of a human baby from the zygote until its birth, there is a stage where the developing stage is forward iterated Hausdorff","PeriodicalId":38784,"journal":{"name":"Bulletin of the Transilvania University of Brasov, Series III: Mathematics, Informatics, Physics","volume":"120 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72910566","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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