Floor
(Built-in Mathematica Symbol) Floor[x] gives the greatest integer less than or equal to x. Floor[x, a] gives the greatest multiple of a less than or equal to x.
E
(Built-in Mathematica Symbol) E is the exponential constant E (base of natural logarithms), with numerical value \[TildeEqual] 2.71828.
EulerGamma is Euler's constant \[Gamma], with numerical value \[TildeEqual] 0.577216.
A standard electronic calculator does all your calculations to a particular accuracy, say ten decimal digits. With Mathematica, however, you can often get exact results. ...
LerchPhi[z, s, a] gives the Lerch transcendent \[CapitalPhi] (z, s, a).
PDF
(Built-in Mathematica Symbol) PDF[dist, x] gives the probability density function for the symbolic distribution dist evaluated at x.PDF[dist, {x_1, x_2, ...}] gives the multivariate probability density ...
Introduction Linear Optimization Numerical Nonlinear Local Optimization
ArcCos
(Built-in Mathematica Symbol) ArcCos[z] gives the arc cosine cos -1 (z) of the complex number z.
ArcSin
(Built-in Mathematica Symbol) ArcSin[z] gives the arc sine sin -1 (z) of the complex number z.
Symbol
(Built-in Mathematica Symbol) Symbol["name"] refers to a symbol with the specified name.