This article was presented by the author at the Vaccination Seminar of May 26, 1972, National University Medical School.

‎Let $Omega$ be a class of unital‎ ‎$C^*$-algebras‎. ‎We introduce the notion of a local tracial $Omega$-algebra‎. ‎Let $A$ be an $alpha$-simple unital local tracial $Omega$-algebra‎. ‎Suppose that $alpha:Gto $Aut($A$) is an action of a finite group $G$ on $A$‎ ‎which has a certain non-simple tracial Rokhlin property‎. ‎Then the crossed product algebra‎ ‎$C^*(G,A,alpha)$ is a unital local traci...

Polymeric materials bearing polar groups constitute a class of macromolecules with interest in number uses. Because the direct synthesis employing polymerization strategies from monomers is very often precluded by catalyst poisoning or uncontrolled side reactions, alternative postpolymerization route consisting modifying previously prepared polymer continuously progressing. However, such poster...