40XX 


Sequences, series, summability 

40Dxx 

Direct theorems on summability 


40D05 
General theorems 


40D09 
Structure of summability fields 


40D10 
Tauberian constants and oscillation limits 


40D15 
Convergence factors and summability factors 


40D20 
Summability and bounded fields of methods 


40D25 
Inclusion and equivalence theorems 


40D99 
None of the above, but in this section 