KLAUS NIEDERKRUGER, Yuri Chekanov, Klaus Niederkruger

2006

In this article, we give a first prototype-definition of overtwistedness in higher dimensions. According to this definition, a contact manifold is called overtwisted if it contains a plastikstufe, aâ€¦ (More)

We discuss two different ways to construct new invariants of Legendrian knots in the standard contact R. These invariants are defined combinatorially, in terms of certain planar projections, andâ€¦ (More)

We studied drops of dodecyl acrylate in poly(dodecyl acrylate) (molecular weight of 25,000) in a spinning drop tensiometer to determine whether an effective interfacial tension (EIT) existed betweenâ€¦ (More)

We study the minimal number C(M, Î¾) of contact charts that one needs to cover a closed connected contact manifold (M, Î¾). Our basic result is C(M, Î¾) â‰¤ dimM + 1. We also compute C(M, Î¾) for allâ€¦ (More)