This book presents a systematic treatment of generalized Orlicz spaces
(also known as Musielak-Orlicz spaces) with minimal assumptions on the
generating Φ-function. It introduces and develops a technique centered
on the use of equivalent Φ-functions. Results from classical functional
analysis are presented in detail and new material is included on
harmonic analysis. Extrapolation is used to prove, for example, the
boundedness of Calderón-Zygmund operators. Finally, central results are
provided for Sobolev spaces, including Poincaré and Sobolev-Poincaré
inequalities in norm and modular forms.
Primarily aimed at researchers and PhD students interested in Orlicz
spaces or generalized Orlicz spaces, this book can be used as a basis
for advanced graduate courses in analysis.