"algebra of continuous functions" . "C*-algebras" . "-homomorphism" . . "C*-algebra" . . "C*-subalgebra" . . "-isomorphic" . . "''C*''-algebras" . "algebra" . "C*-algebra" . . . "*-homomorphisms" . "positive elements" . "state" . "C*-algebra#Finite-dimensional C.2A-algebras" . "reduced group C*-algebra" . "Type I" . "C^*-algebra" . . . "C*-algebra theory" . . "C*-algebra#Finite-dimensional_C.2A-algebras" . "commutative C*-algebra" . . . "-algebra" . "C^*-algebras" . "instance" . . . "C*-algebraic" . "algebraic" . "*-closed" . "-algebras" . . . .