by John on (#6QEH1)
A few days ago I wrote about the approximation for cosine due to the Indian astronomer Aryabhata (476-550) and gave this plot of the error. I said that Aryabhata's approximation is not quite optimal since the ripples in the error function are not of equal height." This was an allusion to the equioscillation theorem. Chebyshev [...]The post Optimal rational approximation first appeared on John D. Cook.