Category
page 1Elementary special functions
logarithm
right|thumb|upright=1.35|Plots of logarithm functions, with three commonly used bases. The special points are indicated by dotted lines, and all curves intersect in .
square root
inverse operation of square for finding the original base number; that base number itself
natural logarithm
logarithm to the base of the mathematical constant e
multiplicative inverse
of a number x, 1 divided by x
inverse trigonometric function
inverse function of the trigonometric function
cube root
number which produces a given number when cubed
Kronecker delta
function
exponential function
mathematical function with a constant base and a variable exponent, denoted exp_a(x) or a^x
constant function
mathematical function whose (output) value is the same for every input value
Dirichlet function
indicator function of rational numbers
sinc function
special mathematical function defined as sin(x)/x
Gudermannian function
function that relates the circular functions and hyperbolic functions without using complex numbers
double exponential function
exponential function of an exponential function
Ptolemy's table of chords
2nd century CE trigonometric table