03XX 


Mathematical logic and foundations 

03Hxx 

Nonstandard models [See also 03C62] 


03H05 
Nonstandard models in mathematics [See also 26E35, 28E05, 30G06, 46S20, 47S20, 54J05] 


03H10 
Other applications of nonstandard models (economics, physics, etc.) 


03H15 
Nonstandard models of arithmetic [See also 11U10, 12L15, 13L05] 


03H99 
None of the above, but in this section 