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Modeling repulsive forces on fibres via knot energies

Simon Blatt, Philipp Reiter (2014)

Molecular Based Mathematical Biology

Modeling of repulsive forces is essential to the understanding of certain bio-physical processes, especially for the motion of DNA molecules. These kinds of phenomena seem to be driven by some sort of “energy” which especially prevents the molecules from strongly bending and forming self-intersections. Inspired by a physical toy model, numerous functionals have been defined during the past twenty-five years that aim at modeling self-avoidance. The general idea is to produce “detangled” curves having...

Modular classes of Q-manifolds: a review and some applications

Andrew James Bruce (2017)

Archivum Mathematicum

A Q-manifold is a supermanifold equipped with an odd vector field that squares to zero. The notion of the modular class of a Q-manifold – which is viewed as the obstruction to the existence of a Q-invariant Berezin volume – is not well know. We review the basic ideas and then apply this technology to various examples, including L -algebroids and higher Poisson manifolds.

Module d’Alexander et représentations métabéliennes

Hajer Jebali (2008)

Annales de la faculté des sciences de Toulouse Mathématiques

On sait, depuis des travaux de Burde et de Rham, que l’étude des représentations du groupe d’un nœud dans le groupe des matrices triangulaires supérieures inversibles d’ordre 2 permet de détecter les racines du polynôme d’Alexander du nœud. Dans ce travail, nous nous proposons de généraliser ce résultat et ce en considérant les représentations du groupe du nœud dans le groupe des matrices triangulaires supérieures inversibles d’ordre n , n 2 . Cette approche nous permettra de retrouver la décomposition...

Module derivations and cohomological splitting of adjoint bundles

Akira Kono, Katsuhiko Kuribayashi (2003)

Fundamenta Mathematicae

Let G be a finite loop space such that the mod p cohomology of the classifying space BG is a polynomial algebra. We consider when the adjoint bundle associated with a G-bundle over M splits on mod p cohomology as an algebra. In the case p = 2, an obstruction for the adjoint bundle to admit such a splitting is found in the Hochschild homology concerning the mod 2 cohomologies of BG and M via a module derivation. Moreover the derivation tells us that the splitting is not compatible with the Steenrod...

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