Axiomatic theory of spectrum III: semiregularities
نویسندگان
چکیده
منابع مشابه
Axiomatic theory of spectrum III. — Semiregularities
The notion of regularity in a Banach algebra was introduced and studied in [KM] and [MM]. A non-empty subset R of a unital Banach algebra A is called a regularity if it satisfies the following two conditions: (i) if a ∈ A and n ∈ N, then a ∈ R ⇔ a ∈ R, (ii) if a, b, c, d are mutually commuting elements of A satisfying ac + bd = 1A then ab ∈ R ⇔ a, b ∈ R. The axioms of regularities are weak enou...
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ژورنال
عنوان ژورنال: Studia Mathematica
سال: 2000
ISSN: 0039-3223,1730-6337
DOI: 10.4064/sm-142-2-159-169