The Projection Postulate from Standard Quantum Mechanics relies fundamentally on measurements. But measurements implicitly suggest the existence of anthropocentric notions like measuring devices, which should rather emerge theory. This article proposes an alternative formulation Mechanics, in is replaced with a version and observations are not assumed as fundamental. More precisely, Wigner func...

Geodesic observers in cosmology are revisited. The coordinates based on freely falling introduced by Gautreau de Sitter and Einstein-de spaces (and, previously, Hoffmann Schwarzschild space) extended to general FLRW universes. We identify situations which the relation between geodesic comoving can be expressed explicitly terms of elementary functions. In general, turn out rather cumbersome limi...