On quantum quaternion spheres
  We give an explicit description of the $q$-deformation of symplectic group $SP_{q}(2n)$ at the $C^*$-algebra level and find all irreducible representations of this $C^{*}$-algebra. Further we describe the $C^*$-algebra of the quotient space $SP_{q}(2n)/SP_{q}(2n-2)$ in terms of generators and relations. We compute its $K$-theory by obtaining a chain of short exact sequence for the $C^{*}$-algebras underlying such manifolds. 
Bipul Saurabh
math.OA