诚挚求教高手：
我用MATLAB作积分int(sqrt((1-x^2)*(2-x^2))出来的结果
1/3*x*(x^4-3*x^2+2)^(1/2)+2/3*(1-x^2)^(1/2)*(4-2*x^2)^(1/2)/(x^4-3*x^2+2)^(1/2)*EllipticF(x,1/2*2^(1/2))-(1-x^2)^(1/2)*(4-2*x^2)^(1/2)/(x^4-3*x^2+2)^(1/2)*(EllipticF(x,1/2*2^(1/2))-EllipticE(x,1/2*2^(1/2)))其中的EllipticF(x,1/2*2^(1/2))和EllipticE(x,1/2*2^(1/2))是什么语句？表示什么意义？是椭圆积分吗？恳求高手指点！！

什么叫“椭圆积分”啊