Deformation and rigidity of simplicial group actions on trees.
Déformation du crochet de poisson sur une variété symplectique.
Deformation of Homeomorphismus on Stratified Sets
Deformation of Maps to Branched Coverings in Dimension Three.
Deformation of string topology into homotopy skein modules.
Deformations and the koherence
The cotangent cohomology of S. Lichtenbaum and M. Schlessinger [Trans. Am. Math. Soc. 128, 41-70 (1967; Zbl 0156.27201)] is known for its ability to control the deformation of the structure of a commutative algebra. Considering algebras in the wider sense to include coalgebras, bialgebras and similar algebraic structures such as the Drinfel’d algebras encountered in the theory of quantum groups, one can model such objects as models for an algebraic theory much in the sense of F. W. Lawvere [Proc....
Deformations of Algebras and Cohomology of Fixed Point Sets.
Deformations of holomorphic foliations having a meromorphic first integral.
Deformations of Lie brackets: cohomological aspects
We introduce a new cohomology for Lie algebroids, and prove that it provides a differential graded Lie algebra which “controls” deformations of the structure bracket of the algebroid.
Deformations of reducible representations of 3-manifold groups into .
Deformations of representations of discrete subgroups of SO (3,1).
Deformations of transversely holomorphic flows on spheres and deformations of hopf manifolds
Deforming representations of knot groups in SU(2).
Deforming Vector Bundles on the Projective Plane.
Degenerate critical points, homotopy indices and Morse inequalities.
Degeneration of Riemann surfaces and intermediate polarization of the moduli space of flat connections.
Degree one maps between small 3-manifolds and Heegaard genus.
Dehn filling: A survey
In this paper we give a brief survey of the present state of knowledge on exceptional Dehn fillings on 3-manifolds with torus boundary. For our discussion, it is necessary to first give a quick overview of what is presently known, and what is conjectured, about the structure of 3-manifolds. This is done in Section 2. In Section 3 we summarize the known bounds on the distances between various kinds of exceptional Dehn fillings, and compare these with the distances that arise in known examples. In...
Dehn twists on nonorientable surfaces
Let be the Dehn twist about a circle a on an orientable surface. It is well known that for each circle b and an integer n, , where I(·,·) is the geometric intersection number. We prove a similar formula for circles on nonorientable surfaces. As a corollary we prove some algebraic properties of twists on nonorientable surfaces. We also prove that if ℳ(N) is the mapping class group of a nonorientable surface N, then up to a finite number of exceptions, the centraliser of the subgroup of ℳ(N) generated...
Deleting-Inserting Theorem for smooth actions of finite nonsolvable groups on spheres.