-bundles and exotic actions
Scalar curvature and connected sums of self-dual 4-manifolds
Under a reasonable vanishing hypothesis, Donaldson and Friedman proved that the connected sum of two self-dual Riemannian 4-manifolds is again self-dual. Here we prove that the same result can be extended to the positive scalar curvature case. This is an analogue of the classical theorem of Gromov–Lawson and Schoen–Yau in the self-dual category. The proof is based on twistor theory.
Scalar curvature, covering spaces, and Seiberg-Witten theory.
Schur and Schubert polynomials as Thom polynomials-cohomology of moduli spaces
The theory of Schur and Schubert polynomials is revisited in this paper from the point of view of generalized Thom polynomials. When we apply a general method to compute Thom polynomials for this case we obtain a new definition for (double versions of) Schur and Schubert polynomials: they will be solutions of interpolation problems.
Scindement d’une équivalence d’homotopie en dimension
Scindements de Hegaard et groupe de homéotopies des petites variétés de Seifert.
Second Chern class and Riemann-Roch for vector bundles on resolutions of surface singularities.
Secondary characteristic classes for the isotropic Grassmannian
Sections Boréliennes pour les feuilletages mesurés.
Seiberg-Witten Floer stable homotopy type of three-manifolds with .
Seiberg-Witten invariants and pseudo-holomorphic subvarieties for self-dual, harmonic 2-forms.
Seiberg-Witten invariants and surface singularities.
Seiberg-Witten invariants, the topological degree and wall crossing formula
Following S. Bauer and M. Furuta we investigate finite dimensional approximations of a monopole map in the case b 1 = 0. We define a certain topological degree which is exactly equal to the Seiberg-Witten invariant. Using homotopy invariance of the topological degree a simple proof of the wall crossing formula is derived.
Seiberg-Witten Theory
We give an introduction into and exposition of Seiberg-Witten theory.
Seifert fibered contact three-manifolds via surgery.
Selection Rules for Topology Change
Self-intersection of fixed manifolds and relations for the multisignature.
Semi-characteristics and free group actions
Semifree Topological Actions of Finite Groups on Spheres.
Semi-free Zp-Actions on Highly-Connected Manifolds.