A Splitting Theorem for Certain Cohomology Theories Associated to BP* ( - ).
A Splitting Theorem for Manifolds.
A splitting theorem for the Kupka component of a foliation of . Addendum to a paper by O. Calvo-Andrade and N. Soares
Here we show that a Kupka component of a codimension 1 singular foliation of with not a square is a complete intersection. The result implies the existence of a meromorphic first integral of .
A splitting theorem for the Kupka component of a foliation of . Addendum to an addendum to a paper by Calvo-Andrade and Soares
Here we show that a Kupka component of a codimension 1 singular foliation of is a complete intersection. The result implies the existence of a meromorphic first integral of . The result was previously known if was assumed to be not a square.
A stability theorem for foliations with singularities [Book]
A stable classification of Lefschetz fibrations.
A stably free nonfree module and its relevance for homotopy classification, case .
A sufficient condition for a group of homeomorphisms to be affine.
A Surgery Sequence in Dimension Four; The Relations with Knot Concordance.
A SURVEY OF SEMIGROUPS OF CONTINUOUS SELFMAPS.
A theorem of Sanderson on link bordisms in dimension 4.
A Theorem of Versality for Unfoldings of Complex Analytic Foliation Singularities.
A Thom isomorphism for infinite rank Euclidean bundles.
A three-dimensional spheroidal space which is not a sphere
A topological collapse number for all spaces
A Topological Invariant for Stable Map Germs.
A topological model of site-specific recombination that predicts the knot and link type of DNA products
This is a short summary of a topological model of site-specific recombination, a cellular reaction that creates knots and links out of circular double stranded DNA molecules. The model is used to predict and characterise the topology of the products of a reaction on double stranded DNA twist knots. It is shown that all such products fall into a small family of Montesinos knots and links, meaning that the knot and link type of possible products is significantly reduced, thus aiding their experimental...
A topological resolution theorem
A topological version of Bertini's theorem
We give a topological version of a Bertini type theorem due to Abhyankar. A new definition of a branched covering is given. If the restriction of the natural projection π: Y × Z → Y to a closed set V ⊂ Y × Z is a branched covering then, under certain assumptions, we can obtain generators of the fundamental group π₁((Y×Z).
A topological view of ordered groups
In this expository article we use topological ideas, notably compactness, to establish certain basic properties of orderable groups. Many of the properties we shall discuss are well-known, but I believe some of the proofs are new. These will be used, in turn, to prove some orderability results, including the left-orderability of the group of PL homeomorphisms of a surface with boundary, which are fixed on at least one boundary component.