This book contains a self-consistent treatment of Besov spaces for W*-dynamical systems, based on the Arveson spectrum and Fourier multipliers. Generalizing classical results by Peller, spaces of Besov operators are then characterized by trace class properties of the associated Hankel operators lying in the W*-crossed product algebra.These criteria allow to extend index theorems to such operator classes.This in turn is of great relevance for applications in solid-state phys...

Spastic diplegia is a very common subtype of cerebral palsy (CP), and CP itself is the most common cause of childhood-onset physical disability. An estimated 17 million people worldwide have CP. Spastic diplegia is also known as bilateral spastic CP or, simply, bilateral CP. With spastic diplegia, the lower limbs are much more affected than the upper limbs, which frequently show only fine motor impairment. Now in its second edition, this practical guide addresses spastic diplegia across th...