The En(n,z) in Math. Defined by
\[ En(n,z) = \int_1^\infty \frac{exp(-z*t)}{t^n} = z^{(n-1)} \Gamma (1-n,z) \]
\[ En(1,z) = \Gamma (0,z) = -Ei(-x) \]
En(x,y) in 3D graph.
Real part on the real axis:
Imaginary part on the real axis:
Real part on the imaginary axis:
Imaginary part on the imaginary axis:
Real part on the complex plane:
Imaginary part on the complex plane:
Absolute value on the complex plane:
Related functions: log
Function category: logarithmic functions