Tag Archives: harmonic

Vortex dynamics

(Updated on 26/4-20) We will investigate the motion of point vortices and dipole vortices on a Riemann surface. We’ll start with the point vortex case and will mainly follow the well-written exposition given by Björn Gustafsson in Vortex motion and … Continue reading

Posted in complex analysis | Tagged , , , | Leave a comment

The cross ratio

The purpose of this post is to show how the cross ratio can be understood as a generalisation of the corresponding invariants in Euclidean and affine geometry and how it is closely related to the concept of a point frame. … Continue reading

Posted in projective geometry | Tagged , , , | Leave a comment