S-duality in hyperkaehler Hodge theory

S.o.s. approximation of polynomials nonnegative on a real algebraic set

SAGBI bases and Degeneration of Spherical Varieties to Toric Varieties

Sagbi Bases of Cox-Nagata Rings

Saito duality between Burnside rings for invertible polynomials

Sandwich theorems for Shioda-Inose structures

Scalar curvature and asymptotic Chow stability of projective bundles and blowups

Scalar extensions of triangulated categories

Schémas de Fano

Schematic Harder-Narasimhan Stratification

Schematic homotopy types and non-abelian Hodge theory

Scheme of lines on a family of 2-dimensional quadrics: geometry and derived category

Scheme theory for groups and Lie algebras

Schemes over $\F_1$ and zeta functions

Schemic Grothendieck rings and motivic rationality

Schinzel's Problem: Imprimitive covers and the monodromy method

Schubert Calculus according to Schubert

Schubert calculus and Gelfand-Zetlin polytopes

Schubert calculus and singularity theory

Schubert calculus for algebraic cobordism