Subspaces in Hermitean Spaces of Countable Dimension.
Summation of singular series corresponding to representations of numbers by some quadratic forms in twelve variables.
Summation of singular series corresponding to the representation of integers by some quadratic forms in fourteen variables.
Sums of 2m-th powers of rational functions in one variable over real closed fields.
Sums of th powers in non-commutative rings.
Sums of mixed powers in fields and orderings of prescribed level.
Sums of nine squares
Sums of powers in rings and the real holomorphy ring.
Sums of squares and quadratric forms in real algebraic geometry
Sums of Squares Coprime in Pairs
Asymptotic formulae are provided for the number of representations of a natural number as the sum of four and of three squares that are pairwise coprime.
Sums of Squares in Central Simple Algebras.
Sums of Squares in Division Algebras.
Sums of squares in
Sums of squares in rings of integers with 2 inverted
We prove that in a ring of S-integers containing 1/2, any totally positive element is a sum of five squares. We also exhibit examples of such rings where some totally positive elements cannot be written as the sum of four squares.
Sums of squares of integral linear forms
Sums of Squares of Linear Forms.
Sums of three squares in certain Cayley rings
Sums of twelve squares
Sums of two powers of linear forms
Supplements to the theory of quartic residues