Mastnak, Mitja; Radjavi, Heydar Matrix semigroups whose ring commutators have real spectra are realizable. (English) Zbl 06805868 Semigroup Forum 95, No. 1, 51-65 (2017). MSC: 47D03 20M20 PDFBibTeX XMLCite \textit{M. Mastnak} and \textit{H. Radjavi}, Semigroup Forum 95, No. 1, 51--65 (2017; Zbl 06805868) Full Text: DOI arXiv
Marcoux, L. W.; Omladič, M.; Popov, Alexey I.; Radjavi, H.; Yahaghi, B. R. Ranges of vector states on irreducible operator semigroups. (English) Zbl 1359.47036 Semigroup Forum 93, No. 2, 264-304 (2016). Reviewer: David Seifert (Oxford) MSC: 47D03 PDFBibTeX XMLCite \textit{L. W. Marcoux} et al., Semigroup Forum 93, No. 2, 264--304 (2016; Zbl 1359.47036) Full Text: DOI Link
Bernik, Janez; Marcoux, Laurent W.; Popov, Alexey I.; Radjavi, Heydar On selfadjoint extensions of semigroups of partial isometries. (English) Zbl 1345.47018 Trans. Am. Math. Soc. 368, No. 11, 7681-7702 (2016). MSC: 47D03 47A65 47B40 20M20 46L10 PDFBibTeX XMLCite \textit{J. Bernik} et al., Trans. Am. Math. Soc. 368, No. 11, 7681--7702 (2016; Zbl 1345.47018) Full Text: DOI arXiv
Jafarian, Ali; Popov, Alexey I.; Radjabalipour, Mehdi; Radjavi, Heydar Commutators of small rank and reducibility of operator semigroups. (English) Zbl 1307.47041 Proc. Am. Math. Soc. 142, No. 12, 4277-4289 (2014). Reviewer: Volodymyr Mazorchuk (Uppsala) MSC: 47D03 20M20 47B47 51F25 PDFBibTeX XMLCite \textit{A. Jafarian} et al., Proc. Am. Math. Soc. 142, No. 12, 4277--4289 (2014; Zbl 1307.47041) Full Text: DOI arXiv
Drnovšek, Roman; Radjavi, Heydar On semigroups of nonnegative functions and positive operators. (English) Zbl 1303.47055 J. Math. Anal. Appl. 404, No. 1, 29-35 (2013). MSC: 47D03 20M20 PDFBibTeX XMLCite \textit{R. Drnovšek} and \textit{H. Radjavi}, J. Math. Anal. Appl. 404, No. 1, 29--35 (2013; Zbl 1303.47055) Full Text: DOI arXiv
Popov, Alexey I.; Radjavi, Heydar Erratum to: “Semigroups of partial isometries”. (English) Zbl 1349.47069 Semigroup Forum 87, No. 3, 679-680 (2013). MSC: 47D03 47B33 PDFBibTeX XMLCite \textit{A. I. Popov} and \textit{H. Radjavi}, Semigroup Forum 87, No. 3, 679--680 (2013; Zbl 1349.47069) Full Text: DOI
Popov, Alexey I.; Radjavi, Heydar Semigroups of partial isometries. (English) Zbl 1349.47068 Semigroup Forum 87, No. 3, 663-678 (2013); erratum ibid. 87, No. 3, 679-680 (2013). MSC: 47D03 47B33 PDFBibTeX XMLCite \textit{A. I. Popov} and \textit{H. Radjavi}, Semigroup Forum 87, No. 3, 663--678 (2013; Zbl 1349.47068) Full Text: DOI arXiv
Bernik, Janez; Mastnak, Mitja; Radjavi, Heydar Realizing irreducible semigroups and real algebras of compact operators. (English) Zbl 1153.47026 J. Math. Anal. Appl. 348, No. 2, 692-707 (2008). Reviewer: Nguyen Van Minh (Carrollton) MSC: 47D03 47A99 PDFBibTeX XMLCite \textit{J. Bernik} et al., J. Math. Anal. Appl. 348, No. 2, 692--707 (2008; Zbl 1153.47026) Full Text: DOI
Livshits, L.; MacDonald, G.; Marcoux, L. W.; Radjavi, H. A Kadison transitivity theorem for \(C^{*}\)-semigroups. (English) Zbl 1147.47029 J. Funct. Anal. 254, No. 1, 246-266 (2008). Reviewer: Vladimir V. Peller (East Lansing) MSC: 47D03 PDFBibTeX XMLCite \textit{L. Livshits} et al., J. Funct. Anal. 254, No. 1, 246--266 (2008; Zbl 1147.47029) Full Text: DOI
Livshits, Leo; MacDonald, Gordon; Radjavi, Heydar Topological transitive matrix semigroups. (English) Zbl 1144.47034 Oper. Matrices 1, No. 2, 165-179 (2007). Reviewer: Andrej V. Bulinski (Moskva) MSC: 47D03 15A30 PDFBibTeX XMLCite \textit{L. Livshits} et al., Oper. Matrices 1, No. 2, 165--179 (2007; Zbl 1144.47034) Full Text: DOI
Radjavi, Heydar; Rosenthal, Peter On submultiplicativity of spectral radius and transitivity of semigroups. (English) Zbl 1113.47027 Proc. Am. Math. Soc. 135, No. 1, 163-168 (2007). Reviewer: Adina Luminiţa Sasu (Timişoara) MSC: 47D03 47A10 PDFBibTeX XMLCite \textit{H. Radjavi} and \textit{P. Rosenthal}, Proc. Am. Math. Soc. 135, No. 1, 163--168 (2007; Zbl 1113.47027) Full Text: DOI
MacDonald, Gordon; Radjavi, Heydar Standard triangularization of semigroups of non-negative operators. (English) Zbl 1066.47040 J. Funct. Anal. 219, No. 1, 161-176 (2005). Reviewer: Andrej V. Bulinski (Moskva) MSC: 47D03 PDFBibTeX XMLCite \textit{G. MacDonald} and \textit{H. Radjavi}, J. Funct. Anal. 219, No. 1, 161--176 (2005; Zbl 1066.47040) Full Text: DOI
Livshits, L.; MacDonald, G.; Mathes, B.; Radjavi, H. Operator semigroups for which reducibility implies decomposability. (English) Zbl 1052.47034 Positivity 7, No. 3, 195-202 (2003). Reviewer: Şafak Alpay (Ankara) MSC: 47D03 47A15 47B60 47B65 47B38 PDFBibTeX XMLCite \textit{L. Livshits} et al., Positivity 7, No. 3, 195--202 (2003; Zbl 1052.47034) Full Text: DOI
Radjavi, H. On semigroups of operators satisfying polynomial identities. (English) Zbl 1027.47033 Proceedings of the 31st Iranian mathematics conference, Tehran, Islamic Republic of Iran, August 27-30, 2000. Tehran: University of Tehran, 395-402 (2000). Reviewer: Aleksandar Perović (Berlin) MSC: 47D03 15A30 PDFBibTeX XMLCite \textit{H. Radjavi}, in: Proceedings of the 31st Iranian mathematics conference, Tehran, Islamic Republic of Iran, August 27--30, 2000. Tehran: University of Tehran. 395--402 (2000; Zbl 1027.47033)
Drnovšek, R.; Livshits, L.; MacDonald, G.; Mathes, B.; Radjavi, H.; Semrl, P. On transitive linear semigroups. (English) Zbl 0970.47024 Linear Algebra Appl. 305, No. 1-3, 67-86 (2000). Reviewer: Wilfried Hazod (Dortmund) MSC: 47D03 15A30 20M20 47A15 20M30 PDFBibTeX XMLCite \textit{R. Drnovšek} et al., Linear Algebra Appl. 305, No. 1--3, 67--86 (2000; Zbl 0970.47024) Full Text: DOI
Omladič, Matjaž; Radjavi, Heydar Irreducible semigroups with multiplicative spectral radius. (English) Zbl 0937.47043 Linear Algebra Appl. 251, 59-72 (1997). MSC: 47D03 47A65 47A10 PDFBibTeX XMLCite \textit{M. Omladič} and \textit{H. Radjavi}, Linear Algebra Appl. 251, 59--72 (1997; Zbl 0937.47043) Full Text: DOI
Choi, M.-D.; Nordgren, E. A.; Radjavi, H.; Rosenthal, P.; Zhong, Y. Triangularizing semigroups of quasinilpotent operators with non-negative entries. (English) Zbl 0818.47035 Indiana Univ. Math. J. 42, No. 1, 15-25 (1993). Reviewer: J.L.R.Webb (Glasgow) MSC: 47D03 47A15 PDFBibTeX XMLCite \textit{M. D. Choi} et al., Indiana Univ. Math. J. 42, No. 1, 15--25 (1993; Zbl 0818.47035) Full Text: DOI
Lambrou, M.; Longstaff, W. E.; Radjavi, H. Spectral conditions and reducibility of operator semigroups. (English) Zbl 0766.47010 Indiana Univ. Math. J. 41, No. 2, 449-464 (1992). Reviewer: H.Radjavi MSC: 47D03 47A10 47A15 15A30 PDFBibTeX XMLCite \textit{M. Lambrou} et al., Indiana Univ. Math. J. 41, No. 2, 449--464 (1992; Zbl 0766.47010) Full Text: DOI
Radjavi, Heydar On reducibility of semigroups of compact operators. (English) Zbl 0691.47034 Indiana Univ. Math. J. 39, No. 2, 499-515 (1990). Reviewer: H.Radjavi MSC: 47D03 47A25 PDFBibTeX XMLCite \textit{H. Radjavi}, Indiana Univ. Math. J. 39, No. 2, 499--515 (1990; Zbl 0691.47034) Full Text: DOI
Radjavi, Heydar On reducibility of semigroups of compact operators. (English) Zbl 0770.47010 Indiana Univ. Math. J. 39, No. 2, 499-515 (1990). MSC: 47D03 47D06 47A25 47A15 PDFBibTeX XMLCite \textit{H. Radjavi}, Indiana Univ. Math. J. 39, No. 2, 499--515 (1990; Zbl 0770.47010) Full Text: DOI
Radjavi, Heydar On the reduction and triangularization of semigroups of operators. (English) Zbl 0581.47026 J. Oper. Theory 13, 63-71 (1985). MSC: 47D03 47A15 47B10 47L30 47A66 PDFBibTeX XMLCite \textit{H. Radjavi}, J. Oper. Theory 13, 63--71 (1985; Zbl 0581.47026)
Radjavi, Heydar; Rosenthal, Peter On fixed points of linear contractions. (English) Zbl 0581.47025 Proc. Am. Math. Soc. 93, 640-642 (1985). MSC: 47D03 47H10 47L07 54H25 PDFBibTeX XMLCite \textit{H. Radjavi} and \textit{P. Rosenthal}, Proc. Am. Math. Soc. 93, 640--642 (1985; Zbl 0581.47025) Full Text: DOI
Nordgren, Eric; Radjavi, Heydar; Rosenthal, Peter Triangularizing semigroups of compact operators. (English) Zbl 0579.47041 Indiana Univ. Math. J. 33, 271-275 (1984). Reviewer: I.Vidav MSC: 47D03 47B10 47A66 PDFBibTeX XMLCite \textit{E. Nordgren} et al., Indiana Univ. Math. J. 33, 271--275 (1984; Zbl 0579.47041) Full Text: DOI