Einstein metrics and smooth structures.
Einstein metrics on exotic spheres in dimensions 7, 11 and 15.
Exotic smooth structures on nonpositively curved symmetric spaces.
Exotic structures on quotient spaces of -actions.
Exotische Sphären als Umgebungsränder in speziellen komplexen Räumen.
Harmonic Maps and the Topology of Stable Hypersurfaces and Manifolds with Non-negative Ricci Curvature
Homology and cohomology of hypersurfaces with quadratic singular points in generic position
Infinitesimal computations in topology
Lefschetz fibrations on compact Stein surfaces.
Lefschetz pencils and divisors in moduli space.
Non-singular graph-manifolds of dimension 4.
On manifolds diffeomorphic on the complement of a point
We prove that four manifolds diffeomorphic on the complement of a point have the same Donaldson invariants.
On Shikata's Distance between differentiable Structures.
On sums of algebraic surfaces.
On the Classification of Topological 4-Manifolds with Finite Fundamental Group.
On the Construction of Codimension Two Minimal Immersions of Exotic Spheres into Euclidean Spheres. II.
On the differentiable structure of certain algebraic surfaces
On the Donaldson polynomials of elliptic surfaces.
On the Hawking wormhole horizon entropy.
On the non-invariance of span and immersion co-dimension for manifolds
In this note we give examples in every dimension of piecewise linearly homeomorphic, closed, connected, smooth -manifolds which admit two smoothness structures with differing spans, stable spans, and immersion co-dimensions. In dimension the examples include the total spaces of certain -sphere bundles over . The construction of such manifolds is based on the topological variance of the second Pontrjagin class: a fact which goes back to Milnor and which was used by Roitberg to give examples...