﻿功能:The symmetric integral of the ﬁrst kind

格式:EllipticRF(x,y,z)

说明:
1. 这里定义如下
$$
\begin{aligned}
\mathbf{EllipticRF}(x, y, z) &= \dfrac{1}{2}\int_0^\infty \dfrac{1}{\sqrt{(t + x)(t + y)(t + z)}}dt
\\
\\
\mathbf{s}\cdot\mathbf{t}\cdot&:x\geq 0,y\geq 0,z\geq 0
\end{aligned}
$$

参考:《NUMERICAL COMPUTATION OF REAL OR COMPLEX ELLIPTIC INTEGRALS》_B.C.CarlsonAmes_Laboratory and Department of Mathematics, Iowa State University,Ames, Iowa 50011-3020, USA

例子:

EllipticRF(i+2.5,2.3-44.5i,i)//回车得到如下解
ans = 0.372511655194332 + 0.119067906448622i