11XX 


Number theory 

11Dxx 

Diophantine equations [See also 11Gxx, 14Gxx] 


11D04 
Linear equations 


11D07 
The Frobenius problem 


11D09 
Quadratic and bilinear equations 


11D25 
Cubic and quartic equations 


11D41 
Higher degree equations; Fermat's equation 


11D45 
Counting solutions of Diophantine equations 


11D57 
Multiplicative and norm form equations 


11D59 
ThueMahler equations 


11D61 
Exponential equations 


11D68 
Rational numbers as sums of fractions 


11D72 
Equations in many variables [See also 11P55] 


11D75 
Diophantine inequalities [See also 11J25] 


11D79 
Congruences in many variables 


11D85 
Representation problems [See also 11P55] 


11D88 
$p$adic and power series fields 


11D99 
None of the above, but in this section 