Starting with the fundamentals of Qa spaces and their relationships to Besov spaces, this book presents all major results around Qa spaces obtained in the past 16 years. The applications of Qa spaces in the study of the incompressible Navier-Stokes system and its stationary form are also discussed. This self-contained book can be used as an essential reference for researchers and graduates in analysis and partial differential equations.

Jie Xiao, Memorial University of Newfoundland, St. John's, Canada