Ideal triangulations of 3-manifolds II; taut and angle structures.
Ideal triangulations of hyperbolic -manifolds
Quello delle triangolazioni geodetiche ideali è un metodo molto potente per costruire strutture iperboliche complete di volume finito su 3-varietà non compatte, ma non è noto se il metodo sia applicabile in generale. È tuttavia noto che esistono triangolazioni ideali parzialmente piatte, ma l'analisi della situazione diviene più ardua sotto diversi aspetti, quando si ha a che fare con tetraedri piatti oltre che veri tetraedri. In particolare, la topologia dello spazio di identificazione può degenerare,...
Ideal Turaev-Viro invariants.
Immersed and virtually embedded -injective surfaces in graph manifolds.
Immersed Spheres in ....2 and S2 x S2.
Incompressible branched surfaces.
Incompressible punctured tori in the complements of alterning knots.
Incompressible surfaces in 2-bridge knot complements.
Increasing trees and Kontsevich cycles.
Indépendance linéaire et classification topologique des espaces normés
Index vector-function and minimal cycles.
Inexistence de structures affines sur les fibrés de Seifert.
Infinite group actions on spheres.
This paper is mainly intended as a survey of the recent work of a number of authors concerning certain infinite group actions on spheres and to raise some as yet unanswered questions. The main thrust of the current research in this area has been to decide what topological and geometrical properties characterise the infinite conformal or Möbius groups. One should then obtain reasonable topological or geometrical restrictions on a subgroup G of the homeomorphism group of a sphere which will imply...
Instability of the eikonal equation and shape from shading
In the shape from shading problem of computer vision one attempts to recover the three-dimensional shape of an object or landscape from the shading on a single image. Under the assumptions that the surface is dusty, distant, and illuminated only from above, the problem reduces to that of solving the eikonal equation |Du|=f on a domain in . Despite various existence and uniqueness theorems for smooth solutions, we show that this problem is unstable, which is catastrophic for general numerical algorithms. ...
Instanton moduli as a novel map from tori to K3-surfaces.
Instantony a topologie čtyřrozměrných variet
Integral HOMFLY-PT and -link homology.
Integral lattices in TQFT
Integrality relations on smooth manifolds.