42XX 


Fourier analysis 


4200 
General reference works (handbooks, dictionaries, bibliographies, etc.) 


4201 
Instructional exposition (textbooks, tutorial papers, etc.) 


4202 
Research exposition (monographs, survey articles) 


4203 
Historical (must also be assigned at least one classification number from Section 01) 


4204 
Explicit machine computation and programs (not the theory of computation or programming) 


4206 
Proceedings, conferences, collections, etc. 

42Axx 

Fourier analysis in one variable 

42Bxx 

Fourier analysis in several variables {For automorphic theory, see mainly 11F30} 

42Cxx 

Nontrigonometric Fourier analysis 