Bertram Yood (2008)
Studia Mathematica
Similarity:
The set of commutators in a Banach *-algebra A, with continuous involution, is examined. Applications are made to the case where A = B(ℓ₂), the algebra of all bounded linear operators on ℓ₂.
V. Rakočević (1984)
Matematički Vesnik
Similarity:
K. Goebel, E. Złotkiewicz (1971)
Colloquium Mathematicae
Similarity:
Jochen Reinermann (1970)
Annales Polonici Mathematici
Similarity:
Stanisław Szufla (1977)
Annales Polonici Mathematici
Similarity:
J. R. Holub (1971)
Colloquium Mathematicae
Similarity:
Ciesielski, K., Moslehian, M.S. (2010)
Annals of Functional Analysis (AFA) [electronic only]
Similarity:
El Harti, R. (2004)
International Journal of Mathematics and Mathematical Sciences
Similarity:
Donald Z. Spicer (1973)
Colloquium Mathematicae
Similarity:
V. Lakshmikantham, A. R. Mitchell, R. W. Mitchell (1978)
Annales Polonici Mathematici
Similarity:
Ciesielski, Krzysztof (2007)
Banach Journal of Mathematical Analysis [electronic only]
Similarity:
B. Yood (2004)
Studia Mathematica
Similarity:
Let A be a Banach *-algebra with an identity, continuous involution, center Z and set of self-adjoint elements Σ. Let h ∈ Σ. The set of v ∈ Σ such that (h + iv)ⁿ is normal for no positive integer n is dense in Σ if and only if h ∉ Z. The case where A has no identity is also treated.