11Exx Forms and linear algebraic groups

11E04  Quadratic forms over general fields
11E08  Quadratic forms over local rings and fields
11E10  Forms over real fields
11E12  Quadratic forms over global rings and fields
11E16  General binary quadratic forms
11E20  General ternary and quaternary quadratic forms; forms of
               more than two variables
11E25  Sums of squares and representations by other particular
               quadratic forms
11E39  Bilinear and Hermitian forms
11E41  Class numbers of quadratic and Hermitian forms
11E45  Analytic theory (Epstein zeta functions; relations with
               automorphic forms and functions)
11E57  Classical groups, See also {14Lxx, 20Gxx}
11E70  $K$-theory of quadratic and Hermitian forms
11E72  Galois cohomology of linear algebraic groups, See also {20G10}
11E76  Forms of degree higher than two
11E81  Algebraic theory of quadratic forms; Witt groups and rings,
               See also {19G12, 19G24}
11E88  Quadratic spaces; Clifford algebras, See also {15A63,  15A66}
11E95  $p$-adic theory
11E99  None of the above but in this section