DirichletL

gives the Dirichlet L-function

for the Dirichlet character

with modulus k and index j.

The possible Dirichlet characters modulo k are specified by an index j, and given by DirichletCharacter.

DirichletL can be evaluated to arbitrary numerical precision for integer k and j, and arbitrary complex s.

A plot along the line

Out[1]=

A plot along the line

Out[1]=

Evaluate for complex arguments:

Evaluate to high precision:

The precision of the output tracks the precision of the input:

Simple exact values are generated automatically:

DirichletL threads element-wise over lists and matrices:

Plot the real part of a DirichletL function on the critical line:

Plot the real part across the critical strip:

Find a zero of a DirichletL function:

Plot real and imaginary parts in the vicinity of nearby zeros:

The real part of a Dirichlet L-function: