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math.DG2016
Centro-affine invariants and the canonical Lorentz metric on the space of centered ellipses
Marcos Salvai
We consider smooth plane curves which are convex with respect to the origin. We describe centro-affine invariants (that is, GL_+(2,R)-invariants), such as centro-affine curvature a…
math.DG2016
A dynamical presentation of the better than nice metric on the disc
Daniela Emmanuele, Marcos Salvai
This is a postprint of our paper "Force free Moebius motions of the circle" (J. Geom. Symmetry Phys. 27 (2012) 59-65), which we hadn't uploaded to arXiv previously. We would like t…