Let A be a semisimple Banach algebra. We define the rank of a nonzero element a in the socle of A to be the minimum of the number of minimal left ideals whose sum contains a. Several characterizations of rank are proved.
@article{bwmeta1.element.bwnjournal-article-smv128i3p287bwm, author = {Matej Bre\v sar and Peter \v Semrl}, title = {Finite rank elements in semisimple Banach algebras}, journal = {Studia Mathematica}, volume = {129}, year = {1998}, pages = {287-298}, zbl = {0901.46039}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-smv128i3p287bwm} }
Brešar, Matej; Šemrl, Peter. Finite rank elements in semisimple Banach algebras. Studia Mathematica, Tome 129 (1998) pp. 287-298. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-smv128i3p287bwm/
[00000] [1] J. C. Alexander, Compact Banach algebras, Proc. London Math. Soc. 18 (1968), 1-18. | Zbl 0184.16502
[00001] [2] B. Aupetit and T. Mouton, Spectrum-preserving linear mappings in Banach algebras, Studia Math. 109 (1994), 91-100.
[00002] [3] B. Aupetit and T. Mouton, Trace and determinant in Banach algebras, ibid. 121 (1996), 115-136.
[00003] [4] M. Brešar and P. Šemrl, Derivations mapping into the socle, Math. Proc. Cambridge Philos. Soc. 120 (1996), 339-346.
[00004] [5] J. M. G. Fell and R. S. Doran, Representations of *-Algebras, Locally Compact Groups, and Banach *-Algebraic Bundles, Vol. 1, Academic Press, Boston, 1988. | Zbl 0652.46050
[00005] [6] A. A. Jafarian and A. R. Sourour, Spectrum preserving linear maps, J. Funct. Anal. 66 (1986), 255-261. | Zbl 0589.47003
[00006] [7] B. V. Limaye, A spectral characterization of operators having rank k, Linear Algebra Appl. 143 (1991), 57-66. | Zbl 0721.47026
[00007] [8] T. Mouton and H. Raubenheimer, On rank one and finite elements of Banach algebras, Studia Math. 104 (1993), 211-219. | Zbl 0814.46035
[00008] [9] P. Nylen and L. Rodman, Approximation numbers and Yamamoto's theorem in Banach algebras, Integral Equations Operator Theory 13 (1990), 728-749. | Zbl 0731.46028
[00009] [10] C. E. Rickart, General Theory of Banach Algebras, The University Series in Higher Mathematics, D. van Nostrand, 1960. | Zbl 0095.09702