id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ejde-203	Arango, Jaime	Oscillation time and damping coefficients in a nonlinear pendulum	2021	9	.pdf	application/pdf	3477	228	74	Analogously, for V (t) we obtain V (t) =x0t sin t+ 3ax20 ∫ t 0 cos(t− s) cos2 sX1(s) ds+O(|x0|4) ≡V1(t) + V2(t) Notice that x̂0 ≤ x0 and the equality holds in the conservative case α = 0 only.	cache/ejde-203.pdf	txt/ejde-203.txt