C5. 指数積分、対数積分

関数
Function	E1 (X As Double, Optional Info As Long) As Double
	指数積分 E1(x)
Function	Ei (X As Double, Optional Info As Long) As Double
	指数積分 Ei(x)
Function	En (X As Double, N As Long, Optional Info As Long) As Double
	指数積分 En(x)
Function	Li (X As Double, Optional Info As Long) As Double
	対数積分 li(x)
Function	Spence (X As Double, Optional Info As Long) As Double
	スペンスの関数 (ジログ関数) Li2(x)
Sub	E1_sub (Ret As Double, X As Double, Optional Info As Long)
	指数積分 E1(x) (サブルーチン版)
Sub	Ei_sub (Ret As Double, X As Double, Optional Info As Long)
	指数積分 Ei(x) (サブルーチン版)
Sub	En_sub (Ret As Double, X As Double, N As Long, Optional Info As Long)
	指数積分 En(x) (サブルーチン版)
Sub	Li_sub (Ret As Double, X As Double, Optional Info As Long)
	対数積分 li(x) (サブルーチン版)
Sub	Spence_sub (Ret As Double, X As Double, Optional Info As Long)
	スペンスの関数 (ジログ関数) Li2(x) (サブルーチン版)

詳解

C5. 指数積分、対数積分 プログラムを表示しています.