delta function (=δ-function)

function， function key

Analgesia function and anti-inflammation function

calibration function or curve [function]

characteristic function (= eigen-function)

characteristic function [of meromorphic function]

characteristic function and type-function

dual function of smarandache LCM function

exceptional function and shared function

function group， function grouping

function of function

increasing function and decreasing function

Littlewood-Paley g-function and -function

liver function and kidney function

Liver function renal function

self-correlation function (=auto correlation function)

step function and hurdle function

Attention deficit and disruptive behavior disorder

Attention deficit and disruptive behavior disorders