12XX 


Field theory and polynomials 

12Hxx 

Differential and difference algebra 


12H05 
Differential algebra [See also 13Nxx] 


12H10 
Difference algebra [See also 39Axx] 


12H20 
Abstract differential equations [See also 34Mxx] 


12H25 
$p$adic differential equations [See also 11S80, 14G20] 


12H99 
None of the above, but in this section 