Benítez López, Julio; Cvetkovic-Ilic, D.(Taylor & Francis (Routledge): STM, Behavioural Science and Public Health Titles, 2013-10)
In this article we study various right ideals associated with two projections (self-adjoint idempotents) in a ring with involution. Results of O.M. Baksalary, G. Trenkler, R. Piziak, P.L. Odell and R. Hahn about orthogonal ...
Benítez López, Julio; Cvetkovic-Ilic, D.; Liu, X.(Duke University Press, 2014)
[EN] Let {a_n} be a sequence of group invertible elements of a unital C* algebra A that converges to a. We present some equivalent conditions for the group invertibility of a and for the convergence of {a^#_n} to a#.