Philosophiae naturalis principia mathematica

TL;DR: In the Scholium to the Definitions at the beginning of the {\em Principia\/} Newton distinguishes absolute time, space, place and motion from their relative counterparts and attempts to justify they are indeed ontologically distinct in that the absolute quantity cannot be reduced to some particular category of the relative as mentioned in this paper.

TL;DR: In this article, a collection of billiard type retroreflectors consisting of four objects is presented; three of them are asymptotically perfect, and the fourth one is very close to perfect.

TL;DR: In this article, the authors consider the stochastic tidal dynamics equations perturbed by multiplicative Gaussian noise and discuss some asymptotic behaviors, including a central limit theorem and a moderate deviation.