35XX 


Partial differential equations 

35Sxx 

Pseudodifferential operators and other generalizations of partial differential operators [See also 47G30, 58J40] 


35S05 
General theory of PsDO 


35S10 
Initial value problems for PsDO 


35S15 
Boundary value problems for PsDO 


35S30 
Fourier integral operators 


35S35 
Topological aspects: intersection cohomology, stratified sets, etc. [See also 32C38, 32S40, 32S60, 58J15] 


35S50 
Paradifferential operators 


35S99 
None of the above, but in this section 