The Dirichlet eta function of *z* in Math. Defined by

Related to the Riemann zeta function by

\[ \eta(z) = \left( 1 - 2^{1-z} \right) \zeta(z) \]Real part on the real axis:

Imaginary part on the real axis is zero.

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: zeta

Function category: zeta functions