数学
半群
类型(生物学)
纯数学
代数表示
正则表示法
域代数上的
离散数学
群(周期表)
生态学
化学
有机化学
生物
作者
Kenneth R. Davidson,Dilian Yang
出处
期刊:Houston Journal of Mathematics
日期:2008-01-01
卷期号:34 (1): 283-288
被引量:4
摘要
A free semigroup algebra is the weak operator topology closed (nonself-adjoint, unital) algebra generated by n isometries with pairwise orthogonal ranges. The prototype is the algebra generated by the left regular representation of the free semigroup on n letters. A free semigroup algebra which is isomorphic to the left regular algebra is called type L. If the infinite ampliation of the isometries generates a type L algebra, it is called weak-* type L. A free semigroup algebra is absolutely continuous if the vector functionals on it are equivalent to (some) vector functionals on the left regular representation.
The purpose of this note is to show that absolutely continuous free semigroup algebras are weak-* type L
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