Separating families for semi-algebraic sets.
Signatures et composantes connexes.
Some properties of the ring of Nash functions
Spaces of orderings of fields under finite extensions.
Splitting patterns of excellent quadratic forms.
Stability index of real varieties.
Summen n-ter Potenzen in Körpern.
Sums of 2 n-th Powers of Real Meromorphic Functions.
Sums of 2m-th powers of rational functions in one variable over real closed fields.
Sums of Fourth Powers of Real Algebraic Functions.
Sums of mixed powers in fields and orderings of prescribed level.
Sums of powers in rings and the real holomorphy ring.
Sums of Squares in Central Simple Algebras.
Sums of Squares in Division Algebras.
Sums of Squares of Linear Forms.