Duggal, B. P. Commutativity theorems for normaloid Hilbert space operators. (English) Zbl 1339.47048 J. Math. Anal. Appl. 429, No. 1, 175-183 (2015). Reviewer: Daniel Beltiţă (Bucureşti) MSC: 47B47 47B20 × Cite Format Result Cite Review PDF Full Text: DOI
Aiena, Pietro; Chō, Muneo; González, Manuel Polaroid type operators under quasi-affinities. (English) Zbl 1204.47006 J. Math. Anal. Appl. 371, No. 2, 485-495 (2010). MSC: 47A10 47A11 47A53 × Cite Format Result Cite Review PDF Full Text: DOI