Compute Distance To:
 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
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### 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
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### 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
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### 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)

### Citations contained in zbMATH Open

134 Publications have been cited 647 times in 331 Documents Cited by Year
Extensions of Jacobson’s lemma. Zbl 1269.47002
Corach, Gustavo; Duggal, Bhaggy; Harte, Robin
2013
Quasi-similar $$p$$-hyponormal operators. Zbl 0866.47014
Duggal, B. P.
1996
Hereditarily normaloid operators. Zbl 1097.47005
Duggal, B. P.
2005
Tensor product of $$n$$-isometries. Zbl 1295.47010
Duggal, B. P.
2012
On $$\ast$$-paranormal contractions and properties for $$\ast$$-class $$A$$ operators. Zbl 1234.47008
Duggal, Bhagwati P.; Jeon, In Ho; Kim, In Hyoun
2012
On Weyl and Browder spectra of tensor products. Zbl 1136.47013
Kubrusly, C. S.; Duggal, B. P.
2008
Polaroid operators and Weyl’s theorem. Zbl 1062.47004
Duggal, Bhaggy; Harte, Robin; Jeon, In Ho
2004
Hereditarily polaroid operators, SVEP and Weyl’s theorem. Zbl 1147.47003
Duggal, B. P.
2008
On the $$a$$-Browder and $$a$$-Weyl spectra of tensor products. Zbl 1241.47016
Duggal, Bhagwati P.; Djordjević, Slavisa V.; Kubrusly, Carlos S.
2010
Weyl’s theorem for a generalized derivation and an elementary operator. Zbl 1093.47509
Duggal, B. P.
2002
On dominant operators. Zbl 0624.47015
Duggal, B. P.
1986
Upper triangular operator matrices, SVEP and Browder, Weyl theorems. Zbl 1236.47004
Duggal, B. P.
2009
Weyl’s theorem, tensor products and multiplication operators. II. Zbl 1197.47050
Duggal, Bhaggy; Harte, Robin; Kim, An-Hyun
2010
A remark on normal derivations. Zbl 0894.47003
Duggal, B. P.
1998
On an elementary operator with $$w$$-hyponormal operator entries. Zbl 1202.47037
Chō, M.; Djordjević, S. V.; Duggal, B. P.; Yamazaki, T.
2010
On characterising contractions with $$C_{10}$$ pure part. Zbl 0908.47019
Duggal, B. P.
1997
Polaroid operators satisfying Weyl’s theorem. Zbl 1096.47039
Duggal, B. P.
2006
Continuity of the spectrum on a class of upper triangular operator matrices. Zbl 1201.47004
Duggal, B. P.; Jeon, I. H.; Kim, I. H.
2010
Tensor product of $$n$$-isometries. III. Zbl 1289.47042
Duggal, B. P.
2012
Tensor product of left $$n$$-invertible operators. Zbl 1273.47037
2013
A remark on generalised Putnam-Fuglede theorems. Zbl 0958.47015
Duggal, B. P.
2001
Tensor products of operators – strong stability and $$p$$-hyponormality. Zbl 0990.47017
Duggal, B. P.
2000
Paranormal contractions have property PF. Zbl 1084.47006
Duggal, B. P.; Kubrusly, C. S.
2004
Putnam-Fuglede theorem and the range-kernel orthogonality of derivations. Zbl 1010.47013
Duggal, B. P.
2001
Browder and Weyl spectra of upper triangular operator matrices. Zbl 1289.47006
Duggal, B. P.
2010
Riesz projections for a class of Hilbert space operators. Zbl 1081.47024
Duggal, B. P.
2005
On generalised Putnam-Fuglede theorems. Zbl 0713.47020
Duggal, B. P.
1989
A Putnam-Fuglede commutativity property for Hilbert space operators. Zbl 1307.47036
Duggal, B. P.; Kubrusly, C. S.
2014
On operators with an absolute value condition. Zbl 1076.47015
Jeon, In Ho; Duggal, B. P.
2004
A note on $$k$$-paranormal operators. Zbl 1197.47037
Kubrusly, C. S.; Duggal, B. P.
2010
Generalized Browder’s and Weyl’s theorems for left and right multiplication operators. Zbl 1202.47004
Boasso, E.; Duggal, B. P.; Jeon, I. H.
2010
Contractions of class $$\mathcal Q$$ and invariant subspaces. Zbl 1085.47010
Duggal, B. P.; Kubrusly, C. S.; Levan, N.
2005
Subspace gaps and range-kernel orthogonality of an elementary operator. Zbl 1050.47035
Duggal, B. P.
2004
Weyl’s theorems and continuity of spectra in the class of $$p$$-hyponormal operators. Zbl 0984.47020
Djordjević, S. V.; Duggal, B. P.
2000
Polaroid operators and generalized Browder–Weyl theorems. Zbl 1180.47006
Duggal, B. P.
2008
Tensor product of $$n$$-isometries. II. Zbl 1289.47041
Duggal, B. P.
2012
On polynomially Riesz operators. Zbl 1466.47011
Živković Zlatanović, Snežana Ć.; Djordjević, Dragan S.; Harte, Robin E.; Duggal, Bhagwati P.
2014
Drazin invertibility of the diagonal of an operator. Zbl 1239.47001
Djordjević, S. V.; Duggal, B. P.
2012
Range kernel orthogonality of derivations. Zbl 0955.47008
Duggal, B. P.
2000
Functional equations and linear transformations. III A: Permutability and inversion. Zbl 0414.47037
Duggal, B. P.
1978
Browder–Weyl theorems, tensor products and multiplications. Zbl 1170.47001
Duggal, B. P.
2009
Weyl’s theorem for direct sums. Zbl 1164.47019
Duggal, Bhagwati P.; Kubrusly, Carlos S.
2007
Polaroid operators, SVEP and perturbed Browder, Weyl theorems. Zbl 1196.47030
Duggal, B. P.
2007
An elementary operator with log-hyponormal, $$p$$-hyponormal entries. Zbl 1140.47024
Duggal, B. P.
2008
Range-kernel orthogonality of the elementary operator $$X\to\sum_{i=1}^n A_iXB_i - X$$. Zbl 1017.47027
Duggal, B. P.
2001
Generalised Weyl’s theorem for a class of operators satisfying a norm condition. Zbl 1089.47005
Duggal, B. P.; Djordjević, S. V.
2004
Hereditarily normaloid contractions. Zbl 1106.47016
Duggal, B. P.; Djordjević, S. V.; Kubrusly, C. S.
2005
Roots of contractions with Hilbert-Schmidt defect operator and $$C_{\cdot 0}$$ completely non-unitary part. Zbl 0885.47007
Duggal, B. P.
1996
$$p$$-hyponormal operators and quasisimilarity. Zbl 1073.47030
Jeon, I. H.; Duggal, B. P.
2004
Contractions with $${\mathcal C}_{\cdot 0}$$ direct summands. Zbl 1011.47011
Kubrusly, C. S.; Duggal, B. P.
2001
Operator equations $$ABA=A^2$$ and $$BAB=B^2$$. Zbl 1258.47028
Duggal, B. P.
2011
Bishop’s property $$(\beta)$$, a commutativity theorem and the dynamics of class $$\mathcal A(s,t)$$ operators. Zbl 1330.47029
Duggal, B. P.; Kubrusly, C. S.; Kim, I. H.
2015
On Weyl’s theorem for quasi-class $$A$$ operators. Zbl 1133.47009
Duggal, Bhagwati P.; Jeon, In Ho; Kim, In Hyoun
2006
Tensor products, multiplications and Weyl’s theorem. Zbl 1123.47018
Aiena, Pietro; Duggal, B. P.
2005
SVEP and generalized Weyl’s theorem. Zbl 1145.47003
Duggal, Bhagwati P.
2007
Weyl’s theorem for totally hereditarily normaloid operators. Zbl 1096.47038
Duggal, B. P.
2004
Contractions with a unitary part. Zbl 0584.47021
Duggal, B. P.
1985
The Weyl spectrum of $$p$$-hyponormal operators. Zbl 0907.47012
Duggal, B. P.
1997
On the spectrum of $$p$$-hyponormal operators. Zbl 0893.47013
Duggal, B. P.
1997
On intertwining operators. Zbl 0652.47019
Duggal, B. P.
1988
Kato type operators and Weyl’s theorem. Zbl 1087.47003
Duggal, B. P.; Djordjević, S. V.; Kubrusly, Carlos
2005
Contractions satisfying the absolute value property $$| A|^2\leq| A^2|$$. Zbl 1092.47034
Duggal, B. P.; Jeon, I. H.; Kubrusly, C. S.
2004
Dunford’s property $$(C)$$ and Weyl’s theorems. Zbl 1034.47003
Duggal, B. P.; Djordjević, S. V.
2002
Finite intertwinings and subscalarity. Zbl 1200.47007
Duggal, B. P.
2010
On $$p$$-quasi-hyponormal operators. Zbl 1123.47020
Duggal, B. P.; Jeon, In Ho
2007
Convolutions and other integral transforms. Zbl 0334.44017
Duggal, B. P.
1976
Weyl’s theorems in the class of algebraically $$p$$-hyponormal operators. Zbl 0997.47019
Duggal, B. P.; Djordjević, S. V.
2000
A remark on normal derivations of Hilbert-Schmidt type. Zbl 0737.47021
Duggal, B. P.
1991
Range-kernel orthogonality and range closure of an elementary operator. Zbl 1083.47029
Duggal, B. P.; Harte, Robin E.
2004
Weak supercyclicity: dynamics of paranormal operators. Zbl 1356.47027
Duggal, B. P.
2016
Tensor products and property $$(w)$$. Zbl 1231.47016
Duggal, B. P.
2011
On quasi-class $$\mathcal A$$ contractions. Zbl 1276.47027
Duggal, B. P.; Jeon, I. H.; Kim, I. H.
2012
Quasi-similar $$k$$-paranormal operators. Zbl 1257.47024
Kubrusly, C. S.; Duggal, B. P.
2011
Perturbations and Weyl’s theorem. Zbl 1126.47002
Duggal, B. P.
2007
Near normality of a class of transforms. Zbl 0388.47015
Duggal, B. P.
1978
Generalised Weyl’s theorem for a class of operators satisfying a norm condition. II. Zbl 1131.47004
Duggal, B. P.; Djordjević, S. V.
2006
Perturbations of operators satisfying a local growth condition. Zbl 1163.47007
Duggal, B. P.
2008
Tensor product of left polaroid operators. Zbl 1275.47043
Boasso, Enrico; Duggal, Bhagwati P.
2012
Spectral continuity of $$k$$-th-roots of hyponormal operators. Zbl 1148.47017
Duggal, B. P.
2007
On posinormal operators. Zbl 1146.47011
Kubrusly, C. S.; Duggal, B. P.
2007
On the spectrum of $$n$$-tuples of $$p$$-hyponormal operators. Zbl 0913.47024
Duggal, B. P.
1998
On $$p$$-hyponormal contractions. Zbl 0819.47032
Duggal, B. P.
1995
On unitary parts of contractions. Zbl 0821.47009
Duggal, B. P.
1994
$$p$$-hyponormal operators satisfy Bishop’s condition $${\beta}$$. Zbl 0989.47017
Duggal, B. P.
2001
Weyl’s theorems for posinormal operators. Zbl 1085.47044
2005
Weyl’s theorem for algebraically totally hereditarily normaloid operators. Zbl 1160.47301
Duggal, B. P.
2005
$$p$$-hyponormal operators and invariant subspaces. Zbl 0937.47025
Duggal, B. P.
1998
Weyl’s theorem through finite ascent property. Zbl 1085.47043
Duggal, B. P.; Djordjević, S. V.
2004
The closure of the range of an elementary operator. Zbl 1087.47040
Duggal, B. P.
2004
Totally hereditarily normaloid operators and Weyl’s theorem for an elementary operator. Zbl 1087.47026
Duggal, B. P.; Kubrusly, C. S.
2005
Upper-lower and left-right semi-Fredholmness. Zbl 1350.47010
Kubrusly, C. S.; Duggal, B. P.
2016
Generalized Browder, Weyl spectra and the polaroid property under compact perturbations. Zbl 1373.47005
Duggal, Bhaggy P.; Kim, In Hyoun
2017
Spectral picture, perturbed Browder and Weyl theorems, and their variations. Zbl 1459.47001
Duggal, B. P.
2017
Paranormal contractions and invariant subspaces. Zbl 1055.47007
Duggal, B. P.; Kubrusly, C. S.; Levan, N.
2004
Asymptotic intertwining by the identity operator and permanence of spectral properties. Zbl 1287.47003
Duggal, B. P.
2013
Upper triangular operators with SVEP: spectral properties. Zbl 1273.47010
Duggal, B. P.
2007
Spectral properties of linear operator through invariant subspaces. Zbl 1273.47009
Djordjević, S. V.; Duggal, B. P.
2009
A Putnam area inequality for the spectrum of $$n$$-tuples of $$p$$-hyponormal operators. Zbl 0954.47023
Duggal, B. P.
1999
PF property and property $$(\beta )$$ for paranormal operators. Zbl 1336.47025
Duggal, B. P.; Kubrusly, C. S.
2014
On Weyl’s theorem for tensor products. Zbl 1267.47031
Kubrusly, C. S.; Duggal, B. P.
2013
Structure of elementary operators defining $$m$$-left invertible, $$m$$-selfadjoint and related classes of operators. Zbl 07315384
Duggal, B. P.; Kim, I. H.
2021
Structure of $$n$$-quasi left $$m$$-invertible and related classes of operators. Zbl 07299078
Duggal, Bhagwati Prashad; Kim, In Hyun
2020
Generalized Kato-meromorphic decomposition, generalized Drazin-meromorphic invertible operators and single-valued extension property. Zbl 07222720
Živković-Zlatanović, S. Č.; Duggal, B. P.
2020
On weak supercyclicity. I. Zbl 1482.47013
Kubrusly, C. S.; Duggal, B. P.
2018
On weak supercyclicity. II. Zbl 1482.47012
Kubrusly, Carlos S.; Duggal, Bhagwati P.
2018
Generalized Browder, Weyl spectra and the polaroid property under compact perturbations. Zbl 1373.47005
Duggal, Bhaggy P.; Kim, In Hyoun
2017
Spectral picture, perturbed Browder and Weyl theorems, and their variations. Zbl 1459.47001
Duggal, B. P.
2017
Perturbed Browder, Weyl theorems and their variations: equivalences. Zbl 06827492
Duggal, B. P.
2017
Perturbation of Banach space operators with a complemented range. Zbl 06791285
Duggal, B. P.; Kubrusly, C. S.
2017
Weak supercyclicity: dynamics of paranormal operators. Zbl 1356.47027
Duggal, B. P.
2016
Upper-lower and left-right semi-Fredholmness. Zbl 1350.47010
Kubrusly, C. S.; Duggal, B. P.
2016
Polynomially meromorphic operators. Zbl 1353.47036
Duggal, B. P.; Djordjević, Dragan S.; Harte, Robin E.; Živković-Zlatanović, Snežana Č.
2016
Bishop’s property $$(\beta)$$, a commutativity theorem and the dynamics of class $$\mathcal A(s,t)$$ operators. Zbl 1330.47029
Duggal, B. P.; Kubrusly, C. S.; Kim, I. H.
2015
Generalized commutativity theorems for Hilbert space operators. Zbl 1355.47019
Duggal, B. P.
2015
Perturbations, quasinilpotent equivalence and communicating operators. Zbl 1343.47016
Djordjević, Dragan S.; Duggal, B. P.; Živković-Zlatanović, S. Č.
2015
A Putnam-Fuglede commutativity property for Hilbert space operators. Zbl 1307.47036
Duggal, B. P.; Kubrusly, C. S.
2014
On polynomially Riesz operators. Zbl 1466.47011
Živković Zlatanović, Snežana Ć.; Djordjević, Dragan S.; Harte, Robin E.; Duggal, Bhagwati P.
2014
PF property and property $$(\beta )$$ for paranormal operators. Zbl 1336.47025
Duggal, B. P.; Kubrusly, C. S.
2014
Elementary operators, finite ascent, range closure and compactness. Zbl 1308.47044
Duggal, B. P.; Djordjević, S. V.; Kubrusly, C. S.
2014
A Putnam-Fuglede commutativity theorem for class $$\mathcal {A}$$ operators. Zbl 1342.47031
Duggal, B. P.; Djordjević, S. V.; Jeon, I. H.
2014
Extensions of Jacobson’s lemma. Zbl 1269.47002
Corach, Gustavo; Duggal, Bhaggy; Harte, Robin
2013
Tensor product of left $$n$$-invertible operators. Zbl 1273.47037
2013
Asymptotic intertwining by the identity operator and permanence of spectral properties. Zbl 1287.47003
Duggal, B. P.
2013
On Weyl’s theorem for tensor products. Zbl 1267.47031
Kubrusly, C. S.; Duggal, B. P.
2013
Upper triangular matrix operators with diagonal $$(T_1,T_2)$$, $$T_2$$ $$k$$-nilpotent. Zbl 1295.47013
Duggal, B. P.
2013
Upper triangular operator matrices, asymptotic intertwining and Browder, Weyl theorems. Zbl 1303.47047
Duggal, Bhagwati P.; Jeon, In; Kim, In
2013
Tensor product of $$n$$-isometries. Zbl 1295.47010
Duggal, B. P.
2012
On $$\ast$$-paranormal contractions and properties for $$\ast$$-class $$A$$ operators. Zbl 1234.47008
Duggal, Bhagwati P.; Jeon, In Ho; Kim, In Hyoun
2012
Tensor product of $$n$$-isometries. III. Zbl 1289.47042
Duggal, B. P.
2012
Tensor product of $$n$$-isometries. II. Zbl 1289.47041
Duggal, B. P.
2012
Drazin invertibility of the diagonal of an operator. Zbl 1239.47001
Djordjević, S. V.; Duggal, B. P.
2012
On quasi-class $$\mathcal A$$ contractions. Zbl 1276.47027
Duggal, B. P.; Jeon, I. H.; Kim, I. H.
2012
Tensor product of left polaroid operators. Zbl 1275.47043
Boasso, Enrico; Duggal, Bhagwati P.
2012
Generalized Browder’s theorem for tensor product and elementary operators. Zbl 1275.47042
Boasso, Enrico; Duggal, B. P.
2012
Operator equations $$ABA=A^2$$ and $$BAB=B^2$$. Zbl 1258.47028
Duggal, B. P.
2011
Tensor products and property $$(w)$$. Zbl 1231.47016
Duggal, B. P.
2011
Quasi-similar $$k$$-paranormal operators. Zbl 1257.47024
Kubrusly, C. S.; Duggal, B. P.
2011
Bishop’s property $$(\beta)$$ and an elementary operator. Zbl 1228.47036
Chō, Muneo; Djordjević, Slavisa; Duggal, Bhaggy
2011
On the $$a$$-Browder and $$a$$-Weyl spectra of tensor products. Zbl 1241.47016
Duggal, Bhagwati P.; Djordjević, Slavisa V.; Kubrusly, Carlos S.
2010
Weyl’s theorem, tensor products and multiplication operators. II. Zbl 1197.47050
Duggal, Bhaggy; Harte, Robin; Kim, An-Hyun
2010
On an elementary operator with $$w$$-hyponormal operator entries. Zbl 1202.47037
Chō, M.; Djordjević, S. V.; Duggal, B. P.; Yamazaki, T.
2010
Continuity of the spectrum on a class of upper triangular operator matrices. Zbl 1201.47004
Duggal, B. P.; Jeon, I. H.; Kim, I. H.
2010
Browder and Weyl spectra of upper triangular operator matrices. Zbl 1289.47006
Duggal, B. P.
2010
A note on $$k$$-paranormal operators. Zbl 1197.47037
Kubrusly, C. S.; Duggal, B. P.
2010
Generalized Browder’s and Weyl’s theorems for left and right multiplication operators. Zbl 1202.47004
Boasso, E.; Duggal, B. P.; Jeon, I. H.
2010
Finite intertwinings and subscalarity. Zbl 1200.47007
Duggal, B. P.
2010
Upper triangular operators with SVEP. Zbl 1238.47003
2010
Upper triangular operator matrices, SVEP and Browder, Weyl theorems. Zbl 1236.47004
Duggal, B. P.
2009
Browder–Weyl theorems, tensor products and multiplications. Zbl 1170.47001
Duggal, B. P.
2009
Spectral properties of linear operator through invariant subspaces. Zbl 1273.47009
Djordjević, S. V.; Duggal, B. P.
2009
The Browder and Weyl spectra of an operator and its diagonal. Zbl 1289.47074
Duggal, B. P.; Djordjević, S. V.; Chõ, M.
2009
On Weyl and Browder spectra of tensor products. Zbl 1136.47013
Kubrusly, C. S.; Duggal, B. P.
2008
Hereditarily polaroid operators, SVEP and Weyl’s theorem. Zbl 1147.47003
Duggal, B. P.
2008
Polaroid operators and generalized Browder–Weyl theorems. Zbl 1180.47006
Duggal, B. P.
2008
An elementary operator with log-hyponormal, $$p$$-hyponormal entries. Zbl 1140.47024
Duggal, B. P.
2008
Perturbations of operators satisfying a local growth condition. Zbl 1163.47007
Duggal, B. P.
2008
Weyl’s theorem for direct sums. Zbl 1164.47019
Duggal, Bhagwati P.; Kubrusly, Carlos S.
2007
Polaroid operators, SVEP and perturbed Browder, Weyl theorems. Zbl 1196.47030
Duggal, B. P.
2007
SVEP and generalized Weyl’s theorem. Zbl 1145.47003
Duggal, Bhagwati P.
2007
On $$p$$-quasi-hyponormal operators. Zbl 1123.47020
Duggal, B. P.; Jeon, In Ho
2007
Perturbations and Weyl’s theorem. Zbl 1126.47002
Duggal, B. P.
2007
Spectral continuity of $$k$$-th-roots of hyponormal operators. Zbl 1148.47017
Duggal, B. P.
2007
On posinormal operators. Zbl 1146.47011
Kubrusly, C. S.; Duggal, B. P.
2007
Upper triangular operators with SVEP: spectral properties. Zbl 1273.47010
Duggal, B. P.
2007
Polaroid operators satisfying Weyl’s theorem. Zbl 1096.47039
Duggal, B. P.
2006
On Weyl’s theorem for quasi-class $$A$$ operators. Zbl 1133.47009
Duggal, Bhagwati P.; Jeon, In Ho; Kim, In Hyoun
2006
Generalised Weyl’s theorem for a class of operators satisfying a norm condition. II. Zbl 1131.47004
Duggal, B. P.; Djordjević, S. V.
2006
A perturbed elementary operator and range-kernel orthogonality. Zbl 1082.47031
Duggal, B. P.
2006
On the range closure of an elementary operator. Zbl 1142.47022
Canavati, Jose Angel; Djordjević, Slavisa V.; Duggal, Bhagwati Prasad
2006
Hereditarily normaloid operators. Zbl 1097.47005
Duggal, B. P.
2005
Riesz projections for a class of Hilbert space operators. Zbl 1081.47024
Duggal, B. P.
2005
Contractions of class $$\mathcal Q$$ and invariant subspaces. Zbl 1085.47010
Duggal, B. P.; Kubrusly, C. S.; Levan, N.
2005
Hereditarily normaloid contractions. Zbl 1106.47016
Duggal, B. P.; Djordjević, S. V.; Kubrusly, C. S.
2005
Tensor products, multiplications and Weyl’s theorem. Zbl 1123.47018
Aiena, Pietro; Duggal, B. P.
2005
Kato type operators and Weyl’s theorem. Zbl 1087.47003
Duggal, B. P.; Djordjević, S. V.; Kubrusly, Carlos
2005
Weyl’s theorems for posinormal operators. Zbl 1085.47044
2005
Weyl’s theorem for algebraically totally hereditarily normaloid operators. Zbl 1160.47301
Duggal, B. P.
2005
Totally hereditarily normaloid operators and Weyl’s theorem for an elementary operator. Zbl 1087.47026
Duggal, B. P.; Kubrusly, C. S.
2005
On the range closure of an elementary operator. Zbl 1079.47037
Duggal, B. P.
2005
Remarks on spectral properties of $$p$$-hyponormal and log-hyponormal operators. Zbl 1080.47021
Duggal, Bhagwati P.; Jeon, In Ho
2005
Subspace gaps and Weyl’s theorem for an elementary operator. Zbl 1126.47033
Duggal, B. P.
2005
Operator matrices: SVEP and Weyl’s theorem. Zbl 1123.47007
Duggal, B. P.; Djordjević, Slavisa V.
2005
Polaroid operators and Weyl’s theorem. Zbl 1062.47004
Duggal, Bhaggy; Harte, Robin; Jeon, In Ho
2004
Paranormal contractions have property PF. Zbl 1084.47006
Duggal, B. P.; Kubrusly, C. S.
2004
On operators with an absolute value condition. Zbl 1076.47015
Jeon, In Ho; Duggal, B. P.
2004
Subspace gaps and range-kernel orthogonality of an elementary operator. Zbl 1050.47035
Duggal, B. P.
2004
Generalised Weyl’s theorem for a class of operators satisfying a norm condition. Zbl 1089.47005
Duggal, B. P.; Djordjević, S. V.
2004
$$p$$-hyponormal operators and quasisimilarity. Zbl 1073.47030
Jeon, I. H.; Duggal, B. P.
2004
Weyl’s theorem for totally hereditarily normaloid operators. Zbl 1096.47038
Duggal, B. P.
2004
Contractions satisfying the absolute value property $$| A|^2\leq| A^2|$$. Zbl 1092.47034
Duggal, B. P.; Jeon, I. H.; Kubrusly, C. S.
2004
Range-kernel orthogonality and range closure of an elementary operator. Zbl 1083.47029
Duggal, B. P.; Harte, Robin E.
2004
Weyl’s theorem through finite ascent property. Zbl 1085.47043
Duggal, B. P.; Djordjević, S. V.
2004
The closure of the range of an elementary operator. Zbl 1087.47040
Duggal, B. P.
2004
Paranormal contractions and invariant subspaces. Zbl 1055.47007
Duggal, B. P.; Kubrusly, C. S.; Levan, N.
2004
Weyl’s theorem for a generalized derivation and an elementary operator. Zbl 1093.47509
Duggal, B. P.
2002
Dunford’s property $$(C)$$ and Weyl’s theorems. Zbl 1034.47003
Duggal, B. P.; Djordjević, S. V.
2002
A remark on generalised Putnam-Fuglede theorems. Zbl 0958.47015
Duggal, B. P.
2001
Putnam-Fuglede theorem and the range-kernel orthogonality of derivations. Zbl 1010.47013
Duggal, B. P.
2001
Range-kernel orthogonality of the elementary operator $$X\to\sum_{i=1}^n A_iXB_i - X$$. Zbl 1017.47027
Duggal, B. P.
2001
Contractions with $${\mathcal C}_{\cdot 0}$$ direct summands. Zbl 1011.47011
Kubrusly, C. S.; Duggal, B. P.
2001
...and 34 more Documents
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### Cited in 92 Serials

 41 Journal of Mathematical Analysis and Applications 31 Linear Algebra and its Applications 19 Rendiconti del Circolo Matemàtico di Palermo. Serie II 16 Integral Equations and Operator Theory 16 Proceedings of the American Mathematical Society 13 Linear and Multilinear Algebra 12 Mediterranean Journal of Mathematics 11 Journal of Inequalities and Applications 8 Periodica Mathematica Hungarica 7 Glasgow Mathematical Journal 7 Operators and Matrices 7 Functional Analysis, Approximation and Computation 7 Korean Journal of Mathematics 6 Complex Analysis and Operator Theory 5 Demonstratio Mathematica 4 Archiv der Mathematik 4 Mathematische Nachrichten 4 Monatshefte für Mathematik 4 Turkish Journal of Mathematics 4 Filomat 4 Acta Mathematica Sinica. English Series 4 Banach Journal of Mathematical Analysis 3 Acta Mathematica Vietnamica 3 Czechoslovak Mathematical Journal 3 Journal of Functional Analysis 3 Bulletin of the Malaysian Mathematical Sciences Society. Second Series 3 Hacettepe Journal of Mathematics and Statistics 3 Asian-European Journal of Mathematics 3 Journal of Function Spaces 2 Ukrainian Mathematical Journal 2 International Journal of Mathematics and Mathematical Sciences 2 Kyungpook Mathematical Journal 2 Communications of the Korean Mathematical Society 2 Comptes Rendus. Mathématique. Académie des Sciences, Paris 2 Journal of Algebra and its Applications 2 The Australian Journal of Mathematical Analysis and Applications 2 Revista de la Real Academia de Ciencias Exactas, Físicas y Naturales. Serie A: Matemáticas. 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
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### 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)