Chō, M.; Djordjević, S. V.; Duggal, B. P.; Yamazaki, T. On an elementary operator with \(w\)-hyponormal operator entries. (English) Zbl 1202.47037 Linear Algebra Appl. 433, No. 11-12, 2070-2079 (2010). Reviewer: Janko Bračič (Ljubljana) MSC: 47B47 47B20 47B49 PDF BibTeX XML Cite \textit{M. Chō} et al., Linear Algebra Appl. 433, No. 11--12, 2070--2079 (2010; Zbl 1202.47037) Full Text: DOI
Duggal, B. P.; Jeon, I. H.; Kim, I. H. Continuity of the spectrum on a class of upper triangular operator matrices. (English) Zbl 1201.47004 J. Math. Anal. Appl. 370, No. 2, 584-587 (2010). MSC: 47A10 PDF BibTeX XML Cite \textit{B. P. Duggal} et al., J. Math. Anal. Appl. 370, No. 2, 584--587 (2010; Zbl 1201.47004) Full Text: DOI
Duggal, B. P. An elementary operator with log-hyponormal, \(p\)-hyponormal entries. (English) Zbl 1140.47024 Linear Algebra Appl. 428, No. 4, 1109-1116 (2008). Reviewer: Aleksej Turnšek (Ljubljana) MSC: 47B47 47B10 47A10 47B40 PDF BibTeX XML Cite \textit{B. P. Duggal}, Linear Algebra Appl. 428, No. 4, 1109--1116 (2008; Zbl 1140.47024) Full Text: DOI
Duggal, B. P. Polaroid operators, SVEP and perturbed Browder, Weyl theorems. (English) Zbl 1196.47030 Rend. Circ. Mat. Palermo (2) 56, No. 3, 317-330 (2007). MSC: 47B47 47A10 47A11 PDF BibTeX XML Cite \textit{B. P. Duggal}, Rend. Circ. Mat. Palermo (2) 56, No. 3, 317--330 (2007; Zbl 1196.47030) Full Text: DOI
Duggal, B. P. Weyl’s theorem and hypercyclic/supercyclic operators. (English) Zbl 1126.47008 J. Math. Anal. Appl. 335, No. 2, 990-995 (2007). Reviewer: Abdellatif Bourhim (Québec) MSC: 47A16 47A10 47A53 PDF BibTeX XML Cite \textit{B. P. Duggal}, J. Math. Anal. Appl. 335, No. 2, 990--995 (2007; Zbl 1126.47008) Full Text: DOI
Duggal, B. P. Paranormal and \((p,k)\)-quasihyponormal operators: spectral continuity. (English) Zbl 1150.47012 Rend. Circ. Mat. Palermo (2) 56, No. 1, 57-64 (2007). Reviewer: Takeaki Yamazaki (Yokohama) MSC: 47B20 47A10 47A11 PDF BibTeX XML Cite \textit{B. P. Duggal}, Rend. Circ. Mat. Palermo (2) 56, No. 1, 57--64 (2007; Zbl 1150.47012) Full Text: DOI
Duggal, B. P. Polaroid operators satisfying Weyl’s theorem. (English) Zbl 1096.47039 Linear Algebra Appl. 414, No. 1, 271-277 (2006). Reviewer: Armando R. Villena (Granada) MSC: 47B47 47A10 47A11 PDF BibTeX XML Cite \textit{B. P. Duggal}, Linear Algebra Appl. 414, No. 1, 271--277 (2006; Zbl 1096.47039) Full Text: DOI
Aiena, Pietro; Duggal, B. P. Tensor products, multiplications and Weyl’s theorem. (English) Zbl 1123.47018 Rend. Circ. Mat. Palermo (2) 54, No. 3, 387-395 (2005). Reviewer: Michal Zajac (Bratislava) MSC: 47A80 47A10 47A11 47B47 PDF BibTeX XML Cite \textit{P. Aiena} and \textit{B. P. Duggal}, Rend. Circ. Mat. Palermo (2) 54, No. 3, 387--395 (2005; Zbl 1123.47018) Full Text: DOI
Duggal, B. P.; Kubrusly, C. S. Totally hereditarily normaloid operators and Weyl’s theorem for an elementary operator. (English) Zbl 1087.47026 J. Math. Anal. Appl. 312, No. 2, 502-513 (2005). Reviewer: Armando R. Villena (Granada) MSC: 47B20 47B47 PDF BibTeX XML Cite \textit{B. P. Duggal} and \textit{C. S. Kubrusly}, J. Math. Anal. Appl. 312, No. 2, 502--513 (2005; Zbl 1087.47026) Full Text: DOI
Duggal, B. P.; Djordjević, S. V.; Kubrusly, Carlos Kato type operators and Weyl’s theorem. (English) Zbl 1087.47003 J. Math. Anal. Appl. 309, No. 2, 433-441 (2005). Reviewer: Takeaki Yamazaki (Yokohama) MSC: 47A10 47B20 PDF BibTeX XML Cite \textit{B. P. Duggal} et al., J. Math. Anal. Appl. 309, No. 2, 433--441 (2005; Zbl 1087.47003) Full Text: DOI
Duggal, B. P. On the range closure of an elementary operator. (English) Zbl 1079.47037 Linear Algebra Appl. 402, 199-206 (2005). Reviewer: M. Brešar (Maribor) MSC: 47B47 47B10 47A10 47B40 PDF BibTeX XML Cite \textit{B. P. Duggal}, Linear Algebra Appl. 402, 199--206 (2005; Zbl 1079.47037) Full Text: DOI
Duggal, B. P. Weyl’s theorem for totally hereditarily normaloid operators. (English) Zbl 1096.47038 Rend. Circ. Mat. Palermo, II. Ser. 53, No. 3, 417-428 (2004). Reviewer: Vladimir V. Kisil (Leeds) MSC: 47B47 47A10 47A11 PDF BibTeX XML Cite \textit{B. P. Duggal}, Rend. Circ. Mat. Palermo (2) 53, No. 3, 417--428 (2004; Zbl 1096.47038) Full Text: DOI
Duggal, B. P. The closure of the range of an elementary operator. (English) Zbl 1087.47040 Linear Algebra Appl. 392, 305-319 (2004). Reviewer: Sergej V. Kislyakov (St. Peterburg) MSC: 47B47 47B10 47A10 47B40 PDF BibTeX XML Cite \textit{B. P. Duggal}, Linear Algebra Appl. 392, 305--319 (2004; Zbl 1087.47040) Full Text: DOI