4 Jan
2018
4 Jan
'18
3:27 p.m.
Dear Pr. Gosper, following our last exchange. You did well to recall the very unusual nature of this continuous fraction that manages to be efficient in terms of calculations despite a theoretical convergence rate of zero. I admit that the formula that I transmitted to you in relation to tan (x) always intrigues me particularly. Le Mardi 2 janvier 2018 23h58, françois mendzina essomba2 <m_essob@yahoo.fr> a écrit : hello... tanh(x) =-csch(2*x)+1/(-csch(4*x)+1/(-csch(8*x)+1/(-csch(16*x)+1/(-csch(32*x)+1/(-csch(64*x)+1/(-csch(128*x)+1/(…))))))); approximation. tanh(x)=-csch(2*x)+1/(-csch(4*x)+1/(-csch(8*x)+1/(-csch(16*x)+1/(-csch(32*x)+1/(-csch(64*x)+1/(-csch(128*x)+1/(1))))))); FME...