We consider the rotation set $\rho(F)$ for a lift $F$ of a homeomorphism $f: T^2 \rightarrow T^2$, which is homotopic to the identity. Our main result is that if a ...

Earth’s rotation has been measured many times over — but never like this. In a first, scientists used entangled quantum particles called photons to reveal the rate at which the globe spins. The feat ...

A trio of physicists from Princeton University, CIT's Jet Propulsion Laboratory and Spectral Sensor Solutions, all in the U.S., is proposing the possibility of generating electricity using energy from ...