﻿功能:一种退化积分

格式:EllipticRC(x,y)

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

参考: Carlson B C . Computing elliptic integrals by duplication[J]. Numerische Mathematik, 1979, 33(1):1-16.
参考:{Carlson Integral<https://mathworld.wolfram.com/CarlsonEllipticIntegrals.html>}

例子:

EllipticRC(i,i)//回车
ans = 0.707106781186547 - 0.707106781186547i