3 papers
math.GT2005
Casson--type invariants in dimension four
Daniel Ruberman, Nikolai Saveliev
This article surveys our ongoing project about the relationship between invariants extending the classical Rohlin invariant of homology spheres and those coming from 4-dimensional…
math.GT2003
Rohlin's invariant and gauge theory, I. Homology 3-tori
Daniel Ruberman, Nikolai Saveliev
This is the first in a series of papers exploring the relationship between the Rohlin invariant and gauge theory. We discuss the Casson-type invariant of a 3-manifold with the inte…
math.AG2002
-actions on contractible threefolds
Shulim Kaliman, Nikolai Saveliev
Let be a smooth contractible affine algebraic threefold with a nontrivial algebraic -action on it. We show that is rational and the algebraic quotient $X//{\bf C…