Edit Profile (opens in new tab) Duggal, Bhagwati Prashad Compute Distance To: Compute Author ID: duggal.bhagwati-prashad Published as: Duggal, B. P.; Duggal, Bhagwati P.; Duggal, Bhagwati Prashad; Duggal, Bhaggy; Duggal, Bhaggy P.; Duggal, Bhagwati; Duggal, Bhagwati Prasad Documents Indexed: 206 Publications since 1975 Reviewing Activity: 141 Reviews Co-Authors: 25 Co-Authors with 86 Joint Publications 338 Co-Co-Authors all top 5 Co-Authors 117 single-authored 32 Kubrusly, Carlos S. 21 Djordjević, Slaviša V. 17 Jeon, In Ho 8 Harte, Robin E. 7 Chō, Muneo 5 Kim, In Hyoun 4 Boasso, Enrico 4 Đorđević, Dragan S. 4 Živković-Zlatanović, Snežana Č. 2 Khalagai, J. M. 2 Levan, Nhan 1 Aiena, Pietro 1 Canavati, Jose Angel 1 Corach, Gustavo 1 Huruya, Tadasi 1 Kapur, M. L. 1 Kim, An-Hyun 1 Kim, In Hyun 1 Ko, Eungil 1 Lee, Woo Young 1 Müller, Vladimír 1 Ôta, Schôichi 1 Rodriguez, M. Febronio 1 Sheth, I. H. 1 Yamazaki, Takeaki all top 5 Serials 16 Linear Algebra and its Applications 15 Journal of Mathematical Analysis and Applications 13 Rendiconti del Circolo Matemàtico di Palermo. Serie II 13 Functional Analysis, Approximation and Computation 10 Integral Equations and Operator Theory 9 Periodica Mathematica Hungarica 8 Acta Scientiarum Mathematicarum 8 Glasgow Mathematical Journal 7 Mathematica Japonica 7 Proceedings of the American Mathematical Society 7 Mathematical Proceedings of the Royal Irish Academy 6 Journal of the Korean Mathematical Society 6 Operators and Matrices 5 Indian Journal of Pure & Applied Mathematics 5 Monatshefte für Mathematik 5 Filomat 4 Studia Scientiarum Mathematicarum Hungarica 4 Bulletin of the Korean Mathematical Society 3 Linear and Multilinear Algebra 3 The Journal of the Indian Mathematical Society. New Series 3 Extracta Mathematicae 3 Advances in Mathematical Sciences and Applications 3 Far East Journal of Mathematical Sciences 2 Studia Mathematica 2 Archiv der Mathematik 2 Bulletin of the London Mathematical Society 2 Demonstratio Mathematica 2 Hokkaido Mathematical Journal 2 International Journal of Mathematics and Mathematical Sciences 2 Annales Societatis Mathematicae Polonae. Seria I. Commentationes Mathematicae 2 Bulletin of the Belgian Mathematical Society - Simon Stevin 2 Journal of Inequalities and Applications 2 Mediterranean Journal of Mathematics 2 Banach Journal of Mathematical Analysis 1 Communications in Algebra 1 Annales de la Faculté des Sciences. Section Mathématique-Physique 1 Czechoslovak Mathematical Journal 1 Journal of the London Mathematical Society. Second Series 1 Kyungpook Mathematical Journal 1 Matematički Vesnik 1 Mathematische Annalen 1 The Mathematics Student 1 Michigan Mathematical Journal 1 Proceedings of the Edinburgh Mathematical Society. Series II 1 Zeitschrift für Analysis und ihre Anwendungen 1 Boletín de la Sociedad Matemática Mexicana. Third Series 1 Scientiae Mathematicae 1 Journal of the Korean Society of Mathematical Education. Series B. The Pure and Applied Mathematics 1 International Mathematical Forum 1 Concrete Operators 1 Korean Journal of Mathematics all top 5 Fields 195 Operator theory (47-XX) 18 Integral transforms, operational calculus (44-XX) 8 Functional analysis (46-XX) 7 Integral equations (45-XX) 5 Harmonic analysis on Euclidean spaces (42-XX) 4 Difference and functional equations (39-XX) 3 Abstract harmonic analysis (43-XX) 1 Real functions (26-XX) 1 Measure and integration (28-XX) 1 Quantum theory (81-XX) Publications by Year all cited Publications top 5 cited Publications Citations contained in zbMATH Open 134 Publications have been cited 647 times in 331 Documents Cited by ▼ Year ▼ Extensions of Jacobson’s lemma. Zbl 1269.47002Corach, Gustavo; Duggal, Bhaggy; Harte, Robin 25 2013 Quasi-similar \(p\)-hyponormal operators. Zbl 0866.47014Duggal, B. P. 24 1996 Hereditarily normaloid operators. Zbl 1097.47005Duggal, B. P. 22 2005 Tensor product of \(n\)-isometries. Zbl 1295.47010Duggal, B. P. 21 2012 On \(\ast\)-paranormal contractions and properties for \(\ast\)-class \(A\) operators. Zbl 1234.47008Duggal, Bhagwati P.; Jeon, In Ho; Kim, In Hyoun 17 2012 On Weyl and Browder spectra of tensor products. Zbl 1136.47013Kubrusly, C. S.; Duggal, B. P. 15 2008 Polaroid operators and Weyl’s theorem. Zbl 1062.47004Duggal, Bhaggy; Harte, Robin; Jeon, In Ho 15 2004 Hereditarily polaroid operators, SVEP and Weyl’s theorem. Zbl 1147.47003Duggal, B. P. 12 2008 On the \(a\)-Browder and \(a\)-Weyl spectra of tensor products. Zbl 1241.47016Duggal, Bhagwati P.; Djordjević, Slavisa V.; Kubrusly, Carlos S. 12 2010 Weyl’s theorem for a generalized derivation and an elementary operator. Zbl 1093.47509Duggal, B. P. 12 2002 On dominant operators. Zbl 0624.47015Duggal, B. P. 12 1986 Upper triangular operator matrices, SVEP and Browder, Weyl theorems. Zbl 1236.47004Duggal, B. P. 12 2009 Weyl’s theorem, tensor products and multiplication operators. II. Zbl 1197.47050Duggal, Bhaggy; Harte, Robin; Kim, An-Hyun 11 2010 A remark on normal derivations. Zbl 0894.47003Duggal, B. P. 11 1998 On an elementary operator with \(w\)-hyponormal operator entries. Zbl 1202.47037Chō, M.; Djordjević, S. V.; Duggal, B. P.; Yamazaki, T. 10 2010 On characterising contractions with \(C_{10}\) pure part. Zbl 0908.47019Duggal, B. P. 10 1997 Polaroid operators satisfying Weyl’s theorem. Zbl 1096.47039Duggal, B. P. 10 2006 Continuity of the spectrum on a class of upper triangular operator matrices. Zbl 1201.47004Duggal, B. P.; Jeon, I. H.; Kim, I. H. 9 2010 Tensor product of \(n\)-isometries. III. Zbl 1289.47042Duggal, B. P. 9 2012 Tensor product of left \(n\)-invertible operators. Zbl 1273.47037Duggal, B. P.; Müller, Vladimir 9 2013 A remark on generalised Putnam-Fuglede theorems. Zbl 0958.47015Duggal, B. P. 9 2001 Tensor products of operators – strong stability and \(p\)-hyponormality. Zbl 0990.47017Duggal, B. P. 9 2000 Paranormal contractions have property PF. Zbl 1084.47006Duggal, B. P.; Kubrusly, C. S. 8 2004 Putnam-Fuglede theorem and the range-kernel orthogonality of derivations. Zbl 1010.47013Duggal, B. P. 8 2001 Browder and Weyl spectra of upper triangular operator matrices. Zbl 1289.47006Duggal, B. P. 8 2010 Riesz projections for a class of Hilbert space operators. Zbl 1081.47024Duggal, B. P. 8 2005 On generalised Putnam-Fuglede theorems. Zbl 0713.47020Duggal, B. P. 8 1989 A Putnam-Fuglede commutativity property for Hilbert space operators. Zbl 1307.47036Duggal, B. P.; Kubrusly, C. S. 8 2014 On operators with an absolute value condition. Zbl 1076.47015Jeon, In Ho; Duggal, B. P. 8 2004 A note on \(k\)-paranormal operators. Zbl 1197.47037Kubrusly, C. S.; Duggal, B. P. 7 2010 Generalized Browder’s and Weyl’s theorems for left and right multiplication operators. Zbl 1202.47004Boasso, E.; Duggal, B. P.; Jeon, I. H. 7 2010 Contractions of class \(\mathcal Q\) and invariant subspaces. Zbl 1085.47010Duggal, B. P.; Kubrusly, C. S.; Levan, N. 7 2005 Subspace gaps and range-kernel orthogonality of an elementary operator. Zbl 1050.47035Duggal, B. P. 7 2004 Weyl’s theorems and continuity of spectra in the class of \(p\)-hyponormal operators. Zbl 0984.47020Djordjević, S. V.; Duggal, B. P. 7 2000 Polaroid operators and generalized Browder–Weyl theorems. Zbl 1180.47006Duggal, B. P. 6 2008 Tensor product of \(n\)-isometries. II. Zbl 1289.47041Duggal, B. P. 6 2012 On polynomially Riesz operators. Zbl 1466.47011Živković Zlatanović, Snežana Ć.; Djordjević, Dragan S.; Harte, Robin E.; Duggal, Bhagwati P. 6 2014 Drazin invertibility of the diagonal of an operator. Zbl 1239.47001Djordjević, S. V.; Duggal, B. P. 6 2012 Range kernel orthogonality of derivations. Zbl 0955.47008Duggal, B. P. 6 2000 Functional equations and linear transformations. III A: Permutability and inversion. Zbl 0414.47037Duggal, B. P. 5 1978 Browder–Weyl theorems, tensor products and multiplications. Zbl 1170.47001Duggal, B. P. 5 2009 Weyl’s theorem for direct sums. Zbl 1164.47019Duggal, Bhagwati P.; Kubrusly, Carlos S. 5 2007 Polaroid operators, SVEP and perturbed Browder, Weyl theorems. Zbl 1196.47030Duggal, B. P. 5 2007 An elementary operator with log-hyponormal, \(p\)-hyponormal entries. Zbl 1140.47024Duggal, B. P. 5 2008 Range-kernel orthogonality of the elementary operator \(X\to\sum_{i=1}^n A_iXB_i - X\). Zbl 1017.47027Duggal, B. P. 5 2001 Generalised Weyl’s theorem for a class of operators satisfying a norm condition. Zbl 1089.47005Duggal, B. P.; Djordjević, S. V. 5 2004 Hereditarily normaloid contractions. Zbl 1106.47016Duggal, B. P.; Djordjević, S. V.; Kubrusly, C. S. 5 2005 Roots of contractions with Hilbert-Schmidt defect operator and \(C_{\cdot 0}\) completely non-unitary part. Zbl 0885.47007Duggal, B. P. 5 1996 \(p\)-hyponormal operators and quasisimilarity. Zbl 1073.47030Jeon, I. H.; Duggal, B. P. 5 2004 Contractions with \({\mathcal C}_{\cdot 0}\) direct summands. Zbl 1011.47011Kubrusly, C. S.; Duggal, B. P. 5 2001 Operator equations \(ABA=A^2\) and \(BAB=B^2\). Zbl 1258.47028Duggal, B. P. 5 2011 Bishop’s property \((\beta)\), a commutativity theorem and the dynamics of class \(\mathcal A(s,t)\) operators. Zbl 1330.47029Duggal, B. P.; Kubrusly, C. S.; Kim, I. H. 5 2015 On Weyl’s theorem for quasi-class \(A\) operators. Zbl 1133.47009Duggal, Bhagwati P.; Jeon, In Ho; Kim, In Hyoun 4 2006 Tensor products, multiplications and Weyl’s theorem. Zbl 1123.47018Aiena, Pietro; Duggal, B. P. 4 2005 SVEP and generalized Weyl’s theorem. Zbl 1145.47003Duggal, Bhagwati P. 4 2007 Weyl’s theorem for totally hereditarily normaloid operators. Zbl 1096.47038Duggal, B. P. 4 2004 Contractions with a unitary part. Zbl 0584.47021Duggal, B. P. 4 1985 The Weyl spectrum of \(p\)-hyponormal operators. Zbl 0907.47012Duggal, B. P. 4 1997 On the spectrum of \(p\)-hyponormal operators. Zbl 0893.47013Duggal, B. P. 4 1997 On intertwining operators. Zbl 0652.47019Duggal, B. P. 4 1988 Kato type operators and Weyl’s theorem. Zbl 1087.47003Duggal, B. P.; Djordjević, S. V.; Kubrusly, Carlos 4 2005 Contractions satisfying the absolute value property \(| A|^2\leq| A^2|\). Zbl 1092.47034Duggal, B. P.; Jeon, I. H.; Kubrusly, C. S. 4 2004 Dunford’s property \((C)\) and Weyl’s theorems. Zbl 1034.47003Duggal, B. P.; Djordjević, S. V. 4 2002 Finite intertwinings and subscalarity. Zbl 1200.47007Duggal, B. P. 3 2010 On \(p\)-quasi-hyponormal operators. Zbl 1123.47020Duggal, B. P.; Jeon, In Ho 3 2007 Convolutions and other integral transforms. Zbl 0334.44017Duggal, B. P. 3 1976 Weyl’s theorems in the class of algebraically \(p\)-hyponormal operators. Zbl 0997.47019Duggal, B. P.; Djordjević, S. V. 3 2000 A remark on normal derivations of Hilbert-Schmidt type. Zbl 0737.47021Duggal, B. P. 3 1991 Range-kernel orthogonality and range closure of an elementary operator. Zbl 1083.47029Duggal, B. P.; Harte, Robin E. 3 2004 Weak supercyclicity: dynamics of paranormal operators. Zbl 1356.47027Duggal, B. P. 3 2016 Tensor products and property \((w)\). Zbl 1231.47016Duggal, B. P. 3 2011 On quasi-class \(\mathcal A\) contractions. Zbl 1276.47027Duggal, B. P.; Jeon, I. H.; Kim, I. H. 3 2012 Quasi-similar \(k\)-paranormal operators. Zbl 1257.47024Kubrusly, C. S.; Duggal, B. P. 3 2011 Perturbations and Weyl’s theorem. Zbl 1126.47002Duggal, B. P. 2 2007 Near normality of a class of transforms. Zbl 0388.47015Duggal, B. P. 2 1978 Generalised Weyl’s theorem for a class of operators satisfying a norm condition. II. Zbl 1131.47004Duggal, B. P.; Djordjević, S. V. 2 2006 Perturbations of operators satisfying a local growth condition. Zbl 1163.47007Duggal, B. P. 2 2008 Tensor product of left polaroid operators. Zbl 1275.47043Boasso, Enrico; Duggal, Bhagwati P. 2 2012 Spectral continuity of \(k\)-th-roots of hyponormal operators. Zbl 1148.47017Duggal, B. P. 2 2007 On posinormal operators. Zbl 1146.47011Kubrusly, C. S.; Duggal, B. P. 2 2007 On the spectrum of \(n\)-tuples of \(p\)-hyponormal operators. Zbl 0913.47024Duggal, B. P. 2 1998 On \(p\)-hyponormal contractions. Zbl 0819.47032Duggal, B. P. 2 1995 On unitary parts of contractions. Zbl 0821.47009Duggal, B. P. 2 1994 \(p\)-hyponormal operators satisfy Bishop’s condition \({\beta}\). Zbl 0989.47017Duggal, B. P. 2 2001 Weyl’s theorems for posinormal operators. Zbl 1085.47044Duggal, Bhagwati Prashad; Kubrusly, Carlos 2 2005 Weyl’s theorem for algebraically totally hereditarily normaloid operators. Zbl 1160.47301Duggal, B. P. 2 2005 \(p\)-hyponormal operators and invariant subspaces. Zbl 0937.47025Duggal, B. P. 2 1998 Weyl’s theorem through finite ascent property. Zbl 1085.47043Duggal, B. P.; Djordjević, S. V. 2 2004 The closure of the range of an elementary operator. Zbl 1087.47040Duggal, B. P. 2 2004 Totally hereditarily normaloid operators and Weyl’s theorem for an elementary operator. Zbl 1087.47026Duggal, B. P.; Kubrusly, C. S. 2 2005 Upper-lower and left-right semi-Fredholmness. Zbl 1350.47010Kubrusly, C. S.; Duggal, B. P. 2 2016 Generalized Browder, Weyl spectra and the polaroid property under compact perturbations. Zbl 1373.47005Duggal, Bhaggy P.; Kim, In Hyoun 2 2017 Spectral picture, perturbed Browder and Weyl theorems, and their variations. Zbl 1459.47001Duggal, B. P. 2 2017 Paranormal contractions and invariant subspaces. Zbl 1055.47007Duggal, B. P.; Kubrusly, C. S.; Levan, N. 2 2004 Asymptotic intertwining by the identity operator and permanence of spectral properties. Zbl 1287.47003Duggal, B. P. 2 2013 Upper triangular operators with SVEP: spectral properties. Zbl 1273.47010Duggal, B. P. 2 2007 Spectral properties of linear operator through invariant subspaces. Zbl 1273.47009Djordjević, S. V.; Duggal, B. P. 2 2009 A Putnam area inequality for the spectrum of \(n\)-tuples of \(p\)-hyponormal operators. Zbl 0954.47023Duggal, B. P. 2 1999 PF property and property \((\beta )\) for paranormal operators. Zbl 1336.47025Duggal, B. P.; Kubrusly, C. S. 2 2014 On Weyl’s theorem for tensor products. Zbl 1267.47031Kubrusly, C. S.; Duggal, B. P. 2 2013 Structure of elementary operators defining \(m\)-left invertible, \(m\)-selfadjoint and related classes of operators. Zbl 07315384Duggal, B. P.; Kim, I. H. 1 2021 Structure of \(n\)-quasi left \(m\)-invertible and related classes of operators. Zbl 07299078Duggal, Bhagwati Prashad; Kim, In Hyun 2 2020 Generalized Kato-meromorphic decomposition, generalized Drazin-meromorphic invertible operators and single-valued extension property. Zbl 07222720Živković-Zlatanović, S. Č.; Duggal, B. P. 1 2020 On weak supercyclicity. I. Zbl 1482.47013Kubrusly, C. S.; Duggal, B. P. 2 2018 On weak supercyclicity. II. Zbl 1482.47012Kubrusly, Carlos S.; Duggal, Bhagwati P. 1 2018 Generalized Browder, Weyl spectra and the polaroid property under compact perturbations. Zbl 1373.47005Duggal, Bhaggy P.; Kim, In Hyoun 2 2017 Spectral picture, perturbed Browder and Weyl theorems, and their variations. Zbl 1459.47001Duggal, B. P. 2 2017 Perturbed Browder, Weyl theorems and their variations: equivalences. Zbl 06827492Duggal, B. P. 1 2017 Perturbation of Banach space operators with a complemented range. Zbl 06791285Duggal, B. P.; Kubrusly, C. S. 1 2017 Weak supercyclicity: dynamics of paranormal operators. Zbl 1356.47027Duggal, B. P. 3 2016 Upper-lower and left-right semi-Fredholmness. Zbl 1350.47010Kubrusly, C. S.; Duggal, B. P. 2 2016 Polynomially meromorphic operators. Zbl 1353.47036Duggal, B. P.; Djordjević, Dragan S.; Harte, Robin E.; Živković-Zlatanović, Snežana Č. 1 2016 Bishop’s property \((\beta)\), a commutativity theorem and the dynamics of class \(\mathcal A(s,t)\) operators. Zbl 1330.47029Duggal, B. P.; Kubrusly, C. S.; Kim, I. H. 5 2015 Generalized commutativity theorems for Hilbert space operators. Zbl 1355.47019Duggal, B. P. 1 2015 Perturbations, quasinilpotent equivalence and communicating operators. Zbl 1343.47016Djordjević, Dragan S.; Duggal, B. P.; Živković-Zlatanović, S. Č. 1 2015 A Putnam-Fuglede commutativity property for Hilbert space operators. Zbl 1307.47036Duggal, B. P.; Kubrusly, C. S. 8 2014 On polynomially Riesz operators. Zbl 1466.47011Živković Zlatanović, Snežana Ć.; Djordjević, Dragan S.; Harte, Robin E.; Duggal, Bhagwati P. 6 2014 PF property and property \((\beta )\) for paranormal operators. Zbl 1336.47025Duggal, B. P.; Kubrusly, C. S. 2 2014 Elementary operators, finite ascent, range closure and compactness. Zbl 1308.47044Duggal, B. P.; Djordjević, S. V.; Kubrusly, C. S. 1 2014 A Putnam-Fuglede commutativity theorem for class \(\mathcal {A}\) operators. Zbl 1342.47031Duggal, B. P.; Djordjević, S. V.; Jeon, I. H. 1 2014 Extensions of Jacobson’s lemma. Zbl 1269.47002Corach, Gustavo; Duggal, Bhaggy; Harte, Robin 25 2013 Tensor product of left \(n\)-invertible operators. Zbl 1273.47037Duggal, B. P.; Müller, Vladimir 9 2013 Asymptotic intertwining by the identity operator and permanence of spectral properties. Zbl 1287.47003Duggal, B. P. 2 2013 On Weyl’s theorem for tensor products. Zbl 1267.47031Kubrusly, C. S.; Duggal, B. P. 2 2013 Upper triangular matrix operators with diagonal \((T_1,T_2)\), \(T_2\) \(k\)-nilpotent. Zbl 1295.47013Duggal, B. P. 1 2013 Upper triangular operator matrices, asymptotic intertwining and Browder, Weyl theorems. Zbl 1303.47047Duggal, Bhagwati P.; Jeon, In; Kim, In 1 2013 Tensor product of \(n\)-isometries. Zbl 1295.47010Duggal, B. P. 21 2012 On \(\ast\)-paranormal contractions and properties for \(\ast\)-class \(A\) operators. Zbl 1234.47008Duggal, Bhagwati P.; Jeon, In Ho; Kim, In Hyoun 17 2012 Tensor product of \(n\)-isometries. III. Zbl 1289.47042Duggal, B. P. 9 2012 Tensor product of \(n\)-isometries. II. Zbl 1289.47041Duggal, B. P. 6 2012 Drazin invertibility of the diagonal of an operator. Zbl 1239.47001Djordjević, S. V.; Duggal, B. P. 6 2012 On quasi-class \(\mathcal A\) contractions. Zbl 1276.47027Duggal, B. P.; Jeon, I. H.; Kim, I. H. 3 2012 Tensor product of left polaroid operators. Zbl 1275.47043Boasso, Enrico; Duggal, Bhagwati P. 2 2012 Generalized Browder’s theorem for tensor product and elementary operators. Zbl 1275.47042Boasso, Enrico; Duggal, B. P. 1 2012 Operator equations \(ABA=A^2\) and \(BAB=B^2\). Zbl 1258.47028Duggal, B. P. 5 2011 Tensor products and property \((w)\). Zbl 1231.47016Duggal, B. P. 3 2011 Quasi-similar \(k\)-paranormal operators. Zbl 1257.47024Kubrusly, C. S.; Duggal, B. P. 3 2011 Bishop’s property \((\beta)\) and an elementary operator. Zbl 1228.47036Chō, Muneo; Djordjević, Slavisa; Duggal, Bhaggy 2 2011 On the \(a\)-Browder and \(a\)-Weyl spectra of tensor products. Zbl 1241.47016Duggal, Bhagwati P.; Djordjević, Slavisa V.; Kubrusly, Carlos S. 12 2010 Weyl’s theorem, tensor products and multiplication operators. II. Zbl 1197.47050Duggal, Bhaggy; Harte, Robin; Kim, An-Hyun 11 2010 On an elementary operator with \(w\)-hyponormal operator entries. Zbl 1202.47037Chō, M.; Djordjević, S. V.; Duggal, B. P.; Yamazaki, T. 10 2010 Continuity of the spectrum on a class of upper triangular operator matrices. Zbl 1201.47004Duggal, B. P.; Jeon, I. H.; Kim, I. H. 9 2010 Browder and Weyl spectra of upper triangular operator matrices. Zbl 1289.47006Duggal, B. P. 8 2010 A note on \(k\)-paranormal operators. Zbl 1197.47037Kubrusly, C. S.; Duggal, B. P. 7 2010 Generalized Browder’s and Weyl’s theorems for left and right multiplication operators. Zbl 1202.47004Boasso, E.; Duggal, B. P.; Jeon, I. H. 7 2010 Finite intertwinings and subscalarity. Zbl 1200.47007Duggal, B. P. 3 2010 Upper triangular operators with SVEP. Zbl 1238.47003Duggal, Bhagwati Prashad 1 2010 Upper triangular operator matrices, SVEP and Browder, Weyl theorems. Zbl 1236.47004Duggal, B. P. 12 2009 Browder–Weyl theorems, tensor products and multiplications. Zbl 1170.47001Duggal, B. P. 5 2009 Spectral properties of linear operator through invariant subspaces. Zbl 1273.47009Djordjević, S. V.; Duggal, B. P. 2 2009 The Browder and Weyl spectra of an operator and its diagonal. Zbl 1289.47074Duggal, B. P.; Djordjević, S. V.; Chõ, M. 1 2009 On Weyl and Browder spectra of tensor products. Zbl 1136.47013Kubrusly, C. S.; Duggal, B. P. 15 2008 Hereditarily polaroid operators, SVEP and Weyl’s theorem. Zbl 1147.47003Duggal, B. P. 12 2008 Polaroid operators and generalized Browder–Weyl theorems. Zbl 1180.47006Duggal, B. P. 6 2008 An elementary operator with log-hyponormal, \(p\)-hyponormal entries. Zbl 1140.47024Duggal, B. P. 5 2008 Perturbations of operators satisfying a local growth condition. Zbl 1163.47007Duggal, B. P. 2 2008 Weyl’s theorem for direct sums. Zbl 1164.47019Duggal, Bhagwati P.; Kubrusly, Carlos S. 5 2007 Polaroid operators, SVEP and perturbed Browder, Weyl theorems. Zbl 1196.47030Duggal, B. P. 5 2007 SVEP and generalized Weyl’s theorem. Zbl 1145.47003Duggal, Bhagwati P. 4 2007 On \(p\)-quasi-hyponormal operators. Zbl 1123.47020Duggal, B. P.; Jeon, In Ho 3 2007 Perturbations and Weyl’s theorem. Zbl 1126.47002Duggal, B. P. 2 2007 Spectral continuity of \(k\)-th-roots of hyponormal operators. Zbl 1148.47017Duggal, B. P. 2 2007 On posinormal operators. Zbl 1146.47011Kubrusly, C. S.; Duggal, B. P. 2 2007 Upper triangular operators with SVEP: spectral properties. Zbl 1273.47010Duggal, B. P. 2 2007 Polaroid operators satisfying Weyl’s theorem. Zbl 1096.47039Duggal, B. P. 10 2006 On Weyl’s theorem for quasi-class \(A\) operators. Zbl 1133.47009Duggal, Bhagwati P.; Jeon, In Ho; Kim, In Hyoun 4 2006 Generalised Weyl’s theorem for a class of operators satisfying a norm condition. II. Zbl 1131.47004Duggal, B. P.; Djordjević, S. V. 2 2006 A perturbed elementary operator and range-kernel orthogonality. Zbl 1082.47031Duggal, B. P. 1 2006 On the range closure of an elementary operator. Zbl 1142.47022Canavati, Jose Angel; Djordjević, Slavisa V.; Duggal, Bhagwati Prasad 1 2006 Hereditarily normaloid operators. Zbl 1097.47005Duggal, B. P. 22 2005 Riesz projections for a class of Hilbert space operators. Zbl 1081.47024Duggal, B. P. 8 2005 Contractions of class \(\mathcal Q\) and invariant subspaces. Zbl 1085.47010Duggal, B. P.; Kubrusly, C. S.; Levan, N. 7 2005 Hereditarily normaloid contractions. Zbl 1106.47016Duggal, B. P.; Djordjević, S. V.; Kubrusly, C. S. 5 2005 Tensor products, multiplications and Weyl’s theorem. Zbl 1123.47018Aiena, Pietro; Duggal, B. P. 4 2005 Kato type operators and Weyl’s theorem. Zbl 1087.47003Duggal, B. P.; Djordjević, S. V.; Kubrusly, Carlos 4 2005 Weyl’s theorems for posinormal operators. Zbl 1085.47044Duggal, Bhagwati Prashad; Kubrusly, Carlos 2 2005 Weyl’s theorem for algebraically totally hereditarily normaloid operators. Zbl 1160.47301Duggal, B. P. 2 2005 Totally hereditarily normaloid operators and Weyl’s theorem for an elementary operator. Zbl 1087.47026Duggal, B. P.; Kubrusly, C. S. 2 2005 On the range closure of an elementary operator. Zbl 1079.47037Duggal, B. P. 1 2005 Remarks on spectral properties of \(p\)-hyponormal and log-hyponormal operators. Zbl 1080.47021Duggal, Bhagwati P.; Jeon, In Ho 1 2005 Subspace gaps and Weyl’s theorem for an elementary operator. Zbl 1126.47033Duggal, B. P. 1 2005 Operator matrices: SVEP and Weyl’s theorem. Zbl 1123.47007Duggal, B. P.; Djordjević, Slavisa V. 1 2005 Polaroid operators and Weyl’s theorem. Zbl 1062.47004Duggal, Bhaggy; Harte, Robin; Jeon, In Ho 15 2004 Paranormal contractions have property PF. Zbl 1084.47006Duggal, B. P.; Kubrusly, C. S. 8 2004 On operators with an absolute value condition. Zbl 1076.47015Jeon, In Ho; Duggal, B. P. 8 2004 Subspace gaps and range-kernel orthogonality of an elementary operator. Zbl 1050.47035Duggal, B. P. 7 2004 Generalised Weyl’s theorem for a class of operators satisfying a norm condition. Zbl 1089.47005Duggal, B. P.; Djordjević, S. V. 5 2004 \(p\)-hyponormal operators and quasisimilarity. Zbl 1073.47030Jeon, I. H.; Duggal, B. P. 5 2004 Weyl’s theorem for totally hereditarily normaloid operators. Zbl 1096.47038Duggal, B. P. 4 2004 Contractions satisfying the absolute value property \(| A|^2\leq| A^2|\). Zbl 1092.47034Duggal, B. P.; Jeon, I. H.; Kubrusly, C. S. 4 2004 Range-kernel orthogonality and range closure of an elementary operator. Zbl 1083.47029Duggal, B. P.; Harte, Robin E. 3 2004 Weyl’s theorem through finite ascent property. Zbl 1085.47043Duggal, B. P.; Djordjević, S. V. 2 2004 The closure of the range of an elementary operator. Zbl 1087.47040Duggal, B. P. 2 2004 Paranormal contractions and invariant subspaces. Zbl 1055.47007Duggal, B. P.; Kubrusly, C. S.; Levan, N. 2 2004 Weyl’s theorem for a generalized derivation and an elementary operator. Zbl 1093.47509Duggal, B. P. 12 2002 Dunford’s property \((C)\) and Weyl’s theorems. Zbl 1034.47003Duggal, B. P.; Djordjević, S. V. 4 2002 A remark on generalised Putnam-Fuglede theorems. Zbl 0958.47015Duggal, B. P. 9 2001 Putnam-Fuglede theorem and the range-kernel orthogonality of derivations. Zbl 1010.47013Duggal, B. P. 8 2001 Range-kernel orthogonality of the elementary operator \(X\to\sum_{i=1}^n A_iXB_i - X\). Zbl 1017.47027Duggal, B. P. 5 2001 Contractions with \({\mathcal C}_{\cdot 0}\) direct summands. Zbl 1011.47011Kubrusly, C. S.; Duggal, B. P. 5 2001 ...and 34 more Documents all cited Publications top 5 cited Publications all top 5 Cited by 230 Authors 79 Duggal, Bhagwati Prashad 17 Kubrusly, Carlos S. 16 Jeon, In Ho 14 Aiena, Pietro 14 Rashid, Mohammad Hussein Mohammad 10 Zeng, Qingping 9 Chō, Muneo 9 Djordjević, Slaviša V. 9 Ko, Eungil 8 Gu, Caixing 7 Kim, In Hyoun 7 Mecheri, Salah 6 Amouch, Mohamed 6 Braha, Naim Latif 6 Cao, Xiaohong 6 Lee, Jieun 6 Zariouh, Hassan 6 Zguitti, Hassane 6 Zhong, Huaijie 5 Bachir, Ahmed 5 Bermúdez, Teresa 5 Boasso, Enrico 5 Gao, Fugen 5 Guillen, Jesús R. 5 Hoxha, Ilmi 5 Li, Xiaochun 5 Mosić, Dijana 5 Moslehian, Mohammad Sal 4 Harte, Robin E. 4 Le, Trieu 4 Lee, Jaewon 4 Martinón, Antonio 4 Noda, Juan Agustín 4 Peña, Pedro 4 Segres, Abdelkader 4 Sid Ahmed, Ould Ahmed Mahmoud 4 Tanahashi, Kôtarô 4 Yan, Kai 4 Zhu, Sen 4 Zuo, Fei 3 Bai, Qingmei 3 Carpintero, Carlos R. 3 Chen, Alatancang 3 Gil’, Michael Iosif 3 Gupta, Anuradha 3 Karmouni, Mohammed 3 Messirdi, Bekkai 3 Nabavi Sales, S. M. S. 3 Pötzsche, Christian 3 Sayyaf, Nawal Ali 3 Tajmouati, Abdelaziz 3 Turnšek, Aleksej 3 Uchiyama, Atsushi 3 Wang, Caihong 3 Yuan, Jiangtao 2 Alaoui Chrifi, Safae 2 Aponte, Elvis 2 Benharrat, Mohammed 2 Benhida, Chafiq 2 Berkani, Mohammed 2 Biondi, Maria Teresa 2 Boumazgour, Mohamed 2 Chen, Huanyin 2 Dharmarha, Preeti 2 García, Orlando J. 2 Gehér, György Pál 2 Han, Young Min 2 Hernández-Garciadiego, Carlos 2 Hocine, Kouider Miloud 2 Huang, Junjie 2 Jung, Sungeun 2 Kim, An-Hyun 2 Kittaneh, Fuad 2 Kumar, Ankit 2 Lee, Woo Young 2 Lombarkia, Farida 2 Maher, Philip J. 2 Mahmoud, Sid Ahmed Ould Mahmoud 2 Mbekhta, Mostafa 2 Pagacz, Patryk 2 Radjabalipour, Mehdi 2 Ram, Sonu 2 Rosas, Ennis R. 2 Saddi, Adel 2 Sanabria, Jose Eduardo 2 Sánchez Perales, Salvador 2 Sheibani Abdolyousefi, Marjan 2 Triolo, Salvatore 2 Wu, Zhenying 2 Zerouali, El Hassan 2 Zhu, Yucan 2 Živković-Zlatanović, Snežana Č. 2 Zuo, Hongliang 1 Abad, Othman 1 Abdullah, Belal 1 Abtahi, Fatemeh 1 Advin 1 Ahmad, Naeem 1 Akay, Barış 1 Alharbi, Asma Olyan M. ...and 130 more Authors all top 5 Cited in 92 Serials 41 Journal of Mathematical Analysis and Applications 31 Linear Algebra and its Applications 19 Rendiconti del Circolo Matemàtico di Palermo. 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RACSAM 2 Annals of Functional Analysis 2 Concrete Operators 2 Advances in Operator Theory 1 Applicable Analysis 1 Communications in Algebra 1 Rocky Mountain Journal of Mathematics 1 Studia Mathematica 1 Collectanea Mathematica 1 Journal of Computational and Applied Mathematics 1 Journal of the Korean Mathematical Society 1 Mathematische Annalen 1 Mathematische Zeitschrift 1 Proceedings of the Edinburgh Mathematical Society. Series II 1 Quaestiones Mathematicae 1 Results in Mathematics 1 Revista de la Unión Matemática Argentina 1 Zeitschrift für Analysis und ihre Anwendungen 1 Bulletin of the Korean Mathematical Society 1 Note di Matematica 1 Acta Mathematica Hungarica 1 Acta Mathematica Universitatis Comenianae. New Series 1 Journal of Contemporary Mathematical Analysis. Armenian Academy of Sciences 1 Aequationes Mathematicae 1 Glasnik Matematički. Serija III 1 Journal of Dynamics and Differential Equations 1 Analele Științifice ale Universității Al. I. Cuza din Iași. Serie Nouă. Matematică 1 Algebra Colloquium 1 Journal of Mathematical Sciences (New York) 1 Complexity 1 Discrete and Continuous Dynamical Systems 1 Abstract and Applied Analysis 1 Positivity 1 Taiwanese Journal of Mathematics 1 Novi Sad Journal of Mathematics 1 Matematychni Studiï 1 Mathematical Inequalities & Applications 1 Lobachevskii Journal of Mathematics 1 Dynamical Systems 1 Journal of the Australian Mathematical Society 1 Kragujevac Journal of Mathematics 1 Applied Mathematics E-Notes 1 Portugaliae Mathematica. Nova Série 1 African Diaspora Journal of Mathematics 1 Proyecciones 1 European Journal of Pure and Applied Mathematics 1 Kyoto Journal of Mathematics 1 Symmetry 1 Afrika Matematika 1 ISRN Geometry 1 Arabian Journal of Mathematics 1 Universal Journal of Mathematics and Mathematical Sciences 1 Journal of Mathematics 1 International Journal of Analysis and Applications 1 Sahand Communications in Mathematical Analysis 1 Open Mathematics all top 5 Cited in 22 Fields 313 Operator theory (47-XX) 23 Functional analysis (46-XX) 12 Linear and multilinear algebra; matrix theory (15-XX) 10 Associative rings and algebras (16-XX) 7 Integral transforms, operational calculus (44-XX) 5 Difference and functional equations (39-XX) 3 Ordinary differential equations (34-XX) 3 Abstract harmonic analysis (43-XX) 3 Differential geometry (53-XX) 3 General topology (54-XX) 2 Dynamical systems and ergodic theory (37-XX) 2 Approximations and expansions (41-XX) 2 Integral equations (45-XX) 1 Number theory (11-XX) 1 Commutative algebra (13-XX) 1 Functions of a complex variable (30-XX) 1 Sequences, series, summability (40-XX) 1 Calculus of variations and optimal control; optimization (49-XX) 1 Statistics (62-XX) 1 Numerical analysis (65-XX) 1 Quantum theory (81-XX) 1 Systems theory; control (93-XX) Citations by Year