> There is a closed-form solution, but only if you extend “closed-form” to mean more than the elementary functions a student would see in a calculus class.
vi_sextus_vi 5 days ago [-]
My bad.
I should have encouraged more curiosity by pointing out that these functions actually have additive as well as multiplicative identities
https://cococubed.com/code_pages/pendulum.shtml
> There is a closed-form solution, but only if you extend “closed-form” to mean more than the elementary functions a student would see in a calculus class.
I should have encouraged more curiosity by pointing out that these functions actually have additive as well as multiplicative identities
https://msp.org/pjm/1955/5-2/pjm-v5-n2-p02-p.pdf
(Might even be relevant to the pendulum, see the comment below on the Arithmetic-Geometric Mean ;)