11A63 Radix representation; digital problems {For metric results, see <a href="#code:11K16">11K16</a>}

11A99 None of the above, but in this section

11B13 Additive bases, including sumsets [See also <a href="#code:05B10">05B10</a>]

11B25 Arithmetic progressions [See also <a href="#code:11N13">11N13</a>]

11B30 Arithmetic combinatorics; higher degree uniformity

11B37 Recurrences {For applications to special functions, see <a href="#code:33-XX">33-XX</a>}

11B39 Fibonacci and Lucas numbers and polynomials and generalizations

11B57 Farey sequences; the sequences ${1^k, 2^k, \cdots}$

11B65 Binomial coefficients; factorials; $q$-identities [See also <a href="#code:05A10">05A10</a>, <a href="#code:05A30">05A30</a>]

11B68 Bernoulli and Euler numbers and polynomials

11B99 None of the above, but in this section

11C08 Polynomials [See also <a href="#code:13F20">13F20</a>]

11C20 Matrices, determinants [See also <a href="#code:15B36">15B36</a>]

11C99 None of the above, but in this section

11Dxx Diophantine equations [See also <a href="#code:11Gxx">11Gxx</a>, <a href="#code:14Gxx">14Gxx</a>]

11D41 Higher degree equations; Fermat's equation

11D45 Counting solutions of Diophantine equations

11D57 Multiplicative and norm form equations

11D68 Rational numbers as sums of fractions

11D72 Equations in many variables [See also <a href="#code:11P55">11P55</a>]

11D75 Diophantine inequalities [See also <a href="#code:11J25">11J25</a>]

11D85 Representation problems [See also <a href="#code:11P55">11P55</a>]

11D99 None of the above, but in this section

11Exx Forms and linear algebraic groups [See also <a href="#code:19Gxx">19Gxx</a>] {For quadratic forms in linear algebra, see <a href="#code:15A63">15A63</a>}

11E04 Quadratic forms over general fields

11E08 Quadratic forms over local rings and fields

11E12 Quadratic forms over global rings and fields

11E20 General ternary and quaternary quadratic forms; forms of more than two variables

11E25 Sums of squares and representations by other particular quadratic forms

11E41 Class numbers of quadratic and Hermitian forms