Small oscillations of the pendulum, Euler's method, and adequality

Vladimir Kanovei, Karin U. Katz, Mikhail G. Katz, Tahl Nowik
2016 Quantum Studies: Mathematics and Foundations  
Small oscillations evolved a great deal from Klein to Robinson. We propose a concept of solution of differential equation based on Euler's method with infinitesimal mesh, with well-posedness based on a relation of adequality following Fermat and Leibniz. The result is that the period of infinitesimal oscillations is independent of their amplitude. Keywords: harmonic motion; infinitesimal; pendulum; small oscillations
doi:10.1007/s40509-016-0074-x fatcat:k5dschbekvf2rkfpcaaoiuyory