VolumeRateOfChange
CellGroupData[{cell_1, cell_2, ...}] is a low-level construct that represents an open group of cells in a notebook. CellGroupData[{cell_1, cell_2, ...}, 1] represents a cell ...
Circle
(Built-in Mathematica Symbol) Circle[{x, y}, r] is a two-dimensional graphics primitive that represents a circle of radius r centered at the point x, y. Circle[{x, y}] gives a circle of radius 1. ...
NotebookDirectory[] gives the directory of the current evaluation notebook. NotebookDirectory[nb] gives the directory for the notebook specified by nb.
PlotRangeClipping is an option for graphics functions that specifies whether graphics objects should be clipped at the edge of the region defined by PlotRange, or should be ...
Stack
(Built-in Mathematica Symbol) Stack[] shows the current evaluation stack, giving a list of the tags associated with evaluations that are currently being done. Stack[pattern] gives a list of expressions ...
Hyphenation is an option for Cell that specifies whether to allow hyphenation for words of text.
MatchQ
(Built-in Mathematica Symbol) MatchQ[expr, form] returns True if the pattern form matches expr, and returns False otherwise.
$Packages gives a list of the contexts corresponding to all packages which have been loaded in your current Mathematica session.
BesselYZero[n, k] represents the k\[Null]^th zero of the Bessel function of the second kind Y_n (x).BesselYZero[n, k, x_0] represents the k\[Null]^th zero greater than x_0.