Abstract
H*-algebras. An H*-algebra A over a field F (C or R) is a Banach algebra whose norm ∣.∣ is derived from an inner product 〈, 〉 and where for each A a two sided adjoint exists such that
for all y and z (see [1]). A is called proper if the adjoint of each element is unique and it is simple if it has no nontrivial closed two-sided ideals. It is known that A has a unit if and only if it is finite dimensional. Two elements x and y are called doubly orthogonal if 〈x, y〉 = 0 and x*y = 0. If A has a unit, which we shall denote by 1, x*y = 0 implies 〈x, y〈 = 〈x1, y〉 = 〈1, x*y〉 = 0.
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References
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© 1992 Springer Science+Business Media Dordrecht
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Cnops, J. (1992). A Gram-Schmidt method in Hilbert modules. In: Micali, A., Boudet, R., Helmstetter, J. (eds) Clifford Algebras and their Applications in Mathematical Physics. Fundamental Theories of Physics, vol 47. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-8090-8_21
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DOI: https://doi.org/10.1007/978-94-015-8090-8_21
Publisher Name: Springer, Dordrecht
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