**Davide Gerosa**, Ulrich Sperhake, Jakub Vošmera.

Classical and Quantum Gravity 34 (2017) 6 ,064004.

arXiv:1612.05263 [gr-qc].

Equal-mass binaries correspond to a discontinuous limit in the spin precession equations. A new constant of motion pops up, which can be exploited to study the dynamics. This is a really neat calculation done with Jakub, a Cambridge undergraduate student. Also, my first paper at Caltech!