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Complete elliptic integrals of the first and second kind
K = ellipke(M) [K,E] = ellipke(M) [K,E] = ellipke(M,tol)The complete elliptic integral of the first kind [1] is:
K
and E
use the modulus k instead of the parameter m. They are related by:K = ellipke(M)
returns the complete elliptic integral of the first kind for the elements of M
.
[K,E] = ellipke(M)
returns the complete elliptic integral of the first and second kinds.
[K,E] = ellipke(M,tol)
computes the Jacobian elliptic functions to accuracy tol
. The default is eps
; increase this for a less accurate but more quickly computed answer.
ellipke
computes the complete elliptic integral using the method of the arithmetic-geometric mean described in [1], section 17.6. It starts with the triplet of numbers:ellipke
computes successive iterations of ai, bi, and ci with:eps
. The complete elliptic integral of the first kind is then: ellipke
is limited to the input domain .
ellipj
Jacobi elliptic functions
[1] Abramowitz, M. and I.A. Stegun, Handbook of Mathematical Functions, Dover Publications, 1965, 17.6.