The Riesz space structure of an Abelian W*-algebra
<p>Let M be an Abelian W*-algebra of operators on a Hilbert space <i>H</i>. Let M<sub>0</sub> be the set of all linear, closed, densely defined transformations in <i>H</i> which commute with every unitary operator in the commutant M’ of M. A well known resul...