33 citations · 77 across the 14 of their papers we have counts for
15 papers
Duality of maximal-torsion and close-packing in double helices
Kasper W. Olsen, Jakob Bohr
It is suggested that there is an interesting transition in double helices. The transition is between a helix, which has maximal torsion for the constituting helical strands, and a…
The convex hull of a convex space curve with four vertices
Jakob Bohr, Steen Markvorsen, Matteo Raffaelli
We obtain an upper bound for the volume of the convex hull of a simple closed Frenet curve with exactly four vertices, i.e., four points of vanishing torsion, and lying on the boun…
Cartan ribbonization and a topological inspection
Matteo Raffaelli, Jakob Bohr, Steen Markvorsen
We develop the concept of Cartan ribbons together with a rolling-based method to ribbonize and approximate any given surface in space by intrinsically flat ribbons. The rolling req…
Do planetary seasons play a fundamental role in attaining habitable climates?
Kasper W Olsen, Jakob Bohr
A simple phenomenological account for planetary climate instabilities is presented. The description is based on the standard model where the balance of incoming stellar radiation a…
A principle for ideal torus knots
Kasper W Olsen, Jakob Bohr
We study simple, knotted and linked torus windings that are made of tubes of finite thickness. Knots which have the shortest rope length are often denoted ideal structures. Convent…
Twist neutrality, a zero sum rule for oriented closed space curves with applications to circular DNA
Jakob Bohr, Kasper W. Olsen
The interplay between global constraints and local material properties of chain molecules is a subject of emerging interest. Studies of molecules that are intrinsically chiral, suc…