Recall that a
Is every non-zero projection $p$ in a C*-algebra $A$ is abelian if the C*-algebra $pAp$ is abelian. Does every C*-algebra admit an abelian non-zero projection?
Is every non-projection a limit supremum or infimum (at least majorized by / majorizes) a family of pairwise orthogonal non-zero projections ?in $A$?
PS. Are there any cheap ways to generate abelian sub C*-algebras of a given C*-algebra (of course, having in mind Akemann's example of a non-separable C*-algebra with each abelian sub-C*-algebra separable)?

