Edit Profile (opens in new tab) Natarajan, Pinnangudi Narayanasubramanian Co-Author Distance Author ID: natarajan.pinnangudi-narayanasubramanian Published as: Natarajan, P. N.; Natarajan, Pinnangudi Narayanasubramanian; Natarajan, Pinnangudi N. more...less Documents Indexed: 102 Publications since 1978, including 7 Books Co-Authors: 8 Co-Authors with 18 Joint Publications 559 Co-Co-Authors all top 5 Co-Authors 84 single-authored 8 Srinivasan, Vaithinathasamy 4 Sakthivel, Shyamala 3 Dutta, Hemen 2 Aasma, Ants 2 Deepa, R. Acharya 1 Bhaskaran, Rajesh 1 Cho, Yeol Je 1 Rangachari, M. S. all top 5 Serials 16 Indian Journal of Mathematics 12 Commentationes Mathematicae 8 Journal of Combinatorics, Information & System Sciences 8 The Journal of Analysis 7 Annales Mathématiques Blaise Pascal 4 \(p\)-Adic Numbers, Ultrametric Analysis, and Applications 3 Analele Științifice ale Universității Al. I. Cuza din Iași. Serie Nouă. Matematică 3 Analysis (München) 2 Indian Journal of Pure & Applied Mathematics 2 Facta Universitatis. Series Mathematics and Informatics 2 Journal of the Ramanujan Mathematical Society 2 Bulletin of the Allahabad Mathematical Society 2 Far East Journal of Mathematical Sciences 2 African Diaspora Journal of Mathematics 1 Bulletin of the Australian Mathematical Society 1 Revue Roumaine de Mathématiques Pures et Appliquées 1 Rocky Mountain Journal of Mathematics 1 Bulletin of the London Mathematical Society 1 Indagationes Mathematicae 1 The Journal of the Indian Mathematical Society. New Series 1 Proceedings of the American Mathematical Society 1 Simon Stevin 1 Bulletin de la Société Matheḿatique de Belgique. Série B 1 Journal of Orissa Mathematical Society 1 Far East Journal of Mathematical Sciences 1 The Ramanujan Journal 1 Scientiae Mathematicae Japonicae 1 Annales Societatis Mathematicae Polonae 1 Communications in Mathematical Analysis 1 Romanian Journal of Mathematics and Computer Science 1 Forum for Interdisciplinary Mathematics 1 SpringerBriefs in Mathematics all top 5 Fields 89 Sequences, series, summability (40-XX) 47 Functional analysis (46-XX) 17 Field theory and polynomials (12-XX) 17 Real functions (26-XX) 11 Operator theory (47-XX) 2 Number theory (11-XX) 1 Approximations and expansions (41-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 37 Publications have been cited 85 times in 47 Documents Cited by ▼ Year ▼ An introductory course in summability theory. Zbl 1375.40001 Aasma, Ants; Dutta, Hemen; Natarajan, P. N. 18 2017 The Steinhaus theorem for Toeplitz matrices in non-archimedean fields. Zbl 0401.40005 Natarajan, P. N. 6 1978 Silvermann-Toeplitz theorem for double sequences and series and its application to Nőrlund means in non-Archimedean fields. Zbl 1009.40002 Natarajan, P. N.; Srinivasan, V. 4 2002 Weighted means in non-Archimedean fields. Zbl 0836.40003 Natarajan, P. N. 4 1995 On the core of a sequence over valued fields. Zbl 0744.47055 Natarajan, P. N. 4 1990 Criterion for regular matrices in non-Archimedean fields. Zbl 0751.40003 Natarajan, P. N. 4 1991 Euler and Taylor methods of summability in complete ultrametric fields. Zbl 1132.40311 Natarajan, P. N. 4 2003 On Nörlund method of summability in non-Archimedean fields. Zbl 0807.40005 Natarajan, P. N. 3 1994 On the \((M,\lambda _{n})\) method of summability. Zbl 1270.40005 Natarajan, P. N. 3 2013 Multiplication of series with terms in a non-Archimedean field. Zbl 0393.40006 Natarajan, P. N. 2 1978 Classical summability theory. Zbl 1380.40001 Natarajan, P. N. 2 2017 An introduction to ultrametric summability theory. 2nd revised and enlarged edition. Zbl 1334.40001 Natarajan, P. N. 2 2015 Product theorems for certain summability methods in non-Archimedean fields. Zbl 1049.40006 Natarajan, P. N. 2 2003 An introduction to ultrametric summability theory. Zbl 1284.40001 Natarajan, P. N. 2 2014 On certain spaces containing the space of Cauchy sequences. Zbl 1245.40007 Natarajan, P. N. 2 1990 Some Steinhaus type theorems over valued fields. Zbl 0897.46062 Natarajan, P. N. 2 1996 Natarajan method of summability for double sequences and series. Zbl 1389.40020 Natarajan, P. N. 1 2016 A theorem of Steinhaus type. Zbl 0918.40001 Natarajan, P. N. 1 1997 Some more Steinhaus type theorems over valued fields. Zbl 0943.47058 Natarajan, P. N. 1 1999 Characterization of a class of infinite matrices with applications. Zbl 0583.46063 Natarajan, P. N. 1 1986 The Schur and Steinhaus theorems for 4-dimensional matrices in ultrametric fields. Zbl 1296.40008 Natarajan, P. N. 1 2011 A generalization of a theorem of Móricz and Rhoades on weighted means. Zbl 1296.40004 Natarajan, P. N. 1 2012 Some characterizations of Schur matrices in ultrametric fields. Zbl 1296.40009 Natarajan, P. N. 1 2012 Cauchy multiplication of Euler summable series in ultrametric fields. Zbl 1306.40008 Deepa, R.; Natarajan, P. N.; Srinivasan, V. 1 2013 An addendum to the paper “Some characterizations of Schur matrices in ultrametric fields”. Zbl 1296.40010 Natarajan, P. N. 1 2013 A characterization of the matrix class \((\ell_{\infty},C_ 0)\). Zbl 0702.40009 Natarajan, P. N. 1 1991 A new definition of convergence of a double sequence and a double series and Silverman-Toeplitz theorem. Zbl 1329.40005 Natarajan, P. N. 1 2014 A Tauberian theorem for weighted means in non-Archimedean fields-revisited and revised. Zbl 1332.40005 Natarajan, P. N. 1 2014 A Steinhaus type theorem. Zbl 0633.40006 Natarajan, P. N. 1 1987 Characterization of some special classes of infinite matrices over non- Archimedean fields. Zbl 0789.40005 Natarajan, P. N. 1 1992 Weighted means for double sequences in non-Archimedean fields. Zbl 1105.40003 Natarajan, P. N.; Sakthivel, S. 1 2006 Another theorem on weighted means. Zbl 1234.40005 Natarajan, P. N. 1 2010 A Tauberian theorem for weighted means in non-Archimedean fields. Zbl 1267.40005 Natarajan, P. N. 1 2009 A theorem on weighted means in non-Archimedean fields. Zbl 1264.12008 Natarajan, P. N. 1 2010 A product theorem for the Euler and the Natarajan methods of summability. Zbl 1282.40003 Natarajan, Pinnangudi Narayanasubramanian 1 2013 Summability matrices of type \(M\) in non-archimedean analysis. Zbl 1239.40007 Natarajan, P. N. 1 2009 Multiplication of double series and convolution of double infinite matrices in non-Archimedean fields. Zbl 1152.40004 Natarajan, P. N.; Sakthivel, S. 1 2008 An introductory course in summability theory. Zbl 1375.40001 Aasma, Ants; Dutta, Hemen; Natarajan, P. N. 18 2017 Classical summability theory. Zbl 1380.40001 Natarajan, P. N. 2 2017 Natarajan method of summability for double sequences and series. Zbl 1389.40020 Natarajan, P. N. 1 2016 An introduction to ultrametric summability theory. 2nd revised and enlarged edition. Zbl 1334.40001 Natarajan, P. N. 2 2015 An introduction to ultrametric summability theory. Zbl 1284.40001 Natarajan, P. N. 2 2014 A new definition of convergence of a double sequence and a double series and Silverman-Toeplitz theorem. Zbl 1329.40005 Natarajan, P. N. 1 2014 A Tauberian theorem for weighted means in non-Archimedean fields-revisited and revised. Zbl 1332.40005 Natarajan, P. N. 1 2014 On the \((M,\lambda _{n})\) method of summability. Zbl 1270.40005 Natarajan, P. N. 3 2013 Cauchy multiplication of Euler summable series in ultrametric fields. Zbl 1306.40008 Deepa, R.; Natarajan, P. N.; Srinivasan, V. 1 2013 An addendum to the paper “Some characterizations of Schur matrices in ultrametric fields”. Zbl 1296.40010 Natarajan, P. N. 1 2013 A product theorem for the Euler and the Natarajan methods of summability. Zbl 1282.40003 Natarajan, Pinnangudi Narayanasubramanian 1 2013 A generalization of a theorem of Móricz and Rhoades on weighted means. Zbl 1296.40004 Natarajan, P. N. 1 2012 Some characterizations of Schur matrices in ultrametric fields. Zbl 1296.40009 Natarajan, P. N. 1 2012 The Schur and Steinhaus theorems for 4-dimensional matrices in ultrametric fields. Zbl 1296.40008 Natarajan, P. N. 1 2011 Another theorem on weighted means. Zbl 1234.40005 Natarajan, P. N. 1 2010 A theorem on weighted means in non-Archimedean fields. Zbl 1264.12008 Natarajan, P. N. 1 2010 A Tauberian theorem for weighted means in non-Archimedean fields. Zbl 1267.40005 Natarajan, P. N. 1 2009 Summability matrices of type \(M\) in non-archimedean analysis. Zbl 1239.40007 Natarajan, P. N. 1 2009 Multiplication of double series and convolution of double infinite matrices in non-Archimedean fields. Zbl 1152.40004 Natarajan, P. N.; Sakthivel, S. 1 2008 Weighted means for double sequences in non-Archimedean fields. Zbl 1105.40003 Natarajan, P. N.; Sakthivel, S. 1 2006 Euler and Taylor methods of summability in complete ultrametric fields. Zbl 1132.40311 Natarajan, P. N. 4 2003 Product theorems for certain summability methods in non-Archimedean fields. Zbl 1049.40006 Natarajan, P. N. 2 2003 Silvermann-Toeplitz theorem for double sequences and series and its application to Nőrlund means in non-Archimedean fields. Zbl 1009.40002 Natarajan, P. N.; Srinivasan, V. 4 2002 Some more Steinhaus type theorems over valued fields. Zbl 0943.47058 Natarajan, P. N. 1 1999 A theorem of Steinhaus type. Zbl 0918.40001 Natarajan, P. N. 1 1997 Some Steinhaus type theorems over valued fields. Zbl 0897.46062 Natarajan, P. N. 2 1996 Weighted means in non-Archimedean fields. Zbl 0836.40003 Natarajan, P. N. 4 1995 On Nörlund method of summability in non-Archimedean fields. Zbl 0807.40005 Natarajan, P. N. 3 1994 Characterization of some special classes of infinite matrices over non- Archimedean fields. Zbl 0789.40005 Natarajan, P. N. 1 1992 Criterion for regular matrices in non-Archimedean fields. Zbl 0751.40003 Natarajan, P. N. 4 1991 A characterization of the matrix class \((\ell_{\infty},C_ 0)\). Zbl 0702.40009 Natarajan, P. N. 1 1991 On the core of a sequence over valued fields. Zbl 0744.47055 Natarajan, P. N. 4 1990 On certain spaces containing the space of Cauchy sequences. Zbl 1245.40007 Natarajan, P. N. 2 1990 A Steinhaus type theorem. Zbl 0633.40006 Natarajan, P. N. 1 1987 Characterization of a class of infinite matrices with applications. Zbl 0583.46063 Natarajan, P. N. 1 1986 The Steinhaus theorem for Toeplitz matrices in non-archimedean fields. Zbl 0401.40005 Natarajan, P. N. 6 1978 Multiplication of series with terms in a non-Archimedean field. Zbl 0393.40006 Natarajan, P. N. 2 1978 all cited Publications top 5 cited Publications all top 5 Cited by 53 Authors 16 Natarajan, Pinnangudi Narayanasubramanian 8 Dutta, Hemen 7 Paikray, Susanta Kumar 4 Jena, Bidu Bhusan 4 Talebi, Gholamreza 3 Das, A. A. 3 Srinivasan, Vaithinathasamy 2 Fernández-Sánchez, Juan 2 Pradhan, Tejaswini 1 Aasma, Ants 1 Akdemir, Ahmet Ocak 1 Alotaibi, Abdullah M. 1 Aral, Nazlim Deniz 1 Baliarsingh, Pinakadhar 1 Bernal-Gonzàlez, Luis 1 Choudhary, Anu 1 Das, Shilpa 1 Debnath, Pradip 1 Durante, Fabrizio 1 Ersoy, Merve Temizer 1 Fatma, Ruqaiyya 1 Fridy, John A. 1 Furkan, Hasan 1 Günal, Şerife 1 Ignazzi, Claudio 1 Jati, R. K. 1 Jemima, D. Eunice 1 Kryczka, Andrzej 1 Kurlej, Konrad 1 Leonetti, Paolo 1 Malkowsky, Eberhard 1 Milovanović, Gradimir V. 1 Orhan, Cihan 1 Pandoh, Suruchi 1 Parida, Priyadarsini 1 Patro, Madhusudan 1 Pinnangudi, Natarajan Narayanasubramanian 1 Pongsriiam, Prapanpong 1 Ragusa, Maria Alessandra 1 Raj, Kuldip 1 Rakočević, Vladimir 1 Rhoades, Billy E. 1 Savaş, Ekrem 1 Selmanogullari, T. 1 Seoane-Sepúlveda, Juan Benigno 1 Tabassum, Sabiha 1 Talo, Özer 1 Termwuttipong, Imchit 1 Trutschnig, Wolfgang 1 Tuğ, Orhan 1 Ünver, Mehmet 1 Yavuz, Enes 1 Yurdakadim, Tuğba all top 5 Cited in 27 Serials 6 Annales Mathématiques Blaise Pascal 4 Journal of Mathematical Analysis and Applications 4 \(p\)-Adic Numbers, Ultrametric Analysis, and Applications 3 Indagationes Mathematicae. New Series 2 Facta Universitatis. Series Mathematics and Informatics 2 Thai Journal of Mathematics 1 Computers & Mathematics with Applications 1 Information Sciences 1 International Journal of Mathematics and Mathematical Sciences 1 The Journal of the Indian Mathematical Society. New Series 1 Proceedings of the American Mathematical Society 1 Bulletin of the Iranian Mathematical Society 1 Computational and Applied Mathematics 1 Turkish Journal of Mathematics 1 Filomat 1 Abstract and Applied Analysis 1 Honam Mathematical Journal 1 Soft Computing 1 Journal of Inequalities and Applications 1 Analysis (München) 1 African Diaspora Journal of Mathematics 1 Proyecciones 1 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. RACSAM 1 Afrika Matematika 1 Journal of Mathematics 1 Journal of Function Spaces 1 Sahand Communications in Mathematical Analysis all top 5 Cited in 13 Fields 37 Sequences, series, summability (40-XX) 19 Functional analysis (46-XX) 8 Real functions (26-XX) 7 Approximations and expansions (41-XX) 6 Operator theory (47-XX) 4 Linear and multilinear algebra; matrix theory (15-XX) 4 Harmonic analysis on Euclidean spaces (42-XX) 3 Number theory (11-XX) 2 Field theory and polynomials (12-XX) 2 General topology (54-XX) 2 Information and communication theory, circuits (94-XX) 1 Combinatorics (05-XX) 1 Measure and integration (28-XX) Citations by Year