meromorphic function
function that is holomorphic everywhere except for a set of isolated points where the function may have poles
modular form
analytic function on the upper half-plane with a certain behavior under the modular group
K-function
generalization of the hyperfactorial to complex numbers
L-function
meromorphic function on the complex plane
holomorphic function
complex functions differentiable everywhere on their domains
gamma function
extension of the factorial function, with its argument shifted down by 1, to real and complex numbers
reciprocal function
function mapping a number to its reciprocal
rational function
ratio of polynomial functions
Riemann zeta function
analytic function
digamma function
logarithmic derivative of the gamma function
elliptic function
class of mathematical functions
Dirichlet L-function
complex function