s s T h is b o ok de als w ith the the o ry of func tion s p ac e s of t
y p e B and F as it s t ands pq pq at the end of the eigh ties. These t
w o scales of spaces co v er man y w ell- kno w n s paces of functions a
nd distributions suc h as H] olde r-Zy gm und s pac e s, Sob ole v s
pac e s, fra- tional Sob o lev s paces (prev ious ly a ls o o ft en
referred to a s Bes s e l-p o ten tial s paces ), Be s o v s pac e s, i
nhom oge ne ous Hardy s p ac e s, s pac e s of BM O-t y p e and l o c al
appro - imation s paces whic h are clos ely c onnected with
Morrey-Campanato s paces.