Extensions of generalized differential calculus in Asplund spaces

We develop an extended generalized differential calculus for normal cones to nonconvex sets, coderivatives of set-valued mappings, and subdifferential of extended-real-valued functions in infinite dimensions. This is a major area of modern variational analysis important for many applications, particularly to optimization, sensitivity, and control. We develop a unified geometric approach to the generalized differential calculus and obtain new results in this direction in a broad setting of Asplund spaces.