-
Recent Posts
- Monopole and dipole dynamics on Riemann surfaces
- The Symmetries of the Quantum Kepler Problem
- The geometry of a second order differential equation, part 2
- The geometry of a second order differential equation, part 1
- The geometry of y”+y=0
- Vortex dynamics
- The Gelfand-Fuchs cocycle
- The Schwarzian derivative
- The Lie bracket is torsion
- The cross ratio
- Sample variance
- Calculating the Lie algebra of a Lie group
- The partial derivative as a quotient
- Second derivative as a quotient
- The second differential
Recent Comments
Vortex dynamics | Cu… on The Schwarzian derivative Archives
- July 2022 (1)
- January 2022 (1)
- July 2020 (3)
- January 2020 (1)
- July 2016 (1)
- September 2015 (1)
- June 2015 (1)
- May 2015 (1)
- April 2015 (2)
- March 2015 (1)
- February 2015 (1)
- January 2015 (1)
Categories
- cohomology (1)
- complex analysis (1)
- differential equations (3)
- differential geometry (3)
- Lie groups (2)
- Okategoriserade (2)
- projective geometry (5)
- statistics (1)
Tags
Meta
Monthly Archives: May 2015
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 cross ratio, harmonic, projective frame, projective line
Leave a comment