SphericalBesselY[n, z] gives the spherical Bessel function of the second kind y_n (z).

SphericalHankelH2[n, z] gives the spherical Hankel function of the second kind h_n^(2)(z).

$KernelID is a unique ID number assigned to each running parallel kernel.

$LibraryPath gives the default list of directories to search in attempting to find a library.

$MessageGroups is the list of rules that gives named message groups used in functions like On and Quiet.

DaysPlus[{year, month, day}, n] gives the date n days after the date {year, month, day}.DaysPlus[{year, month, day, hour, minute, second}, n] gives the date n days after the ...

LogPlot, ListLogPlot, and related functions have been added to the built-in Mathematica kernel. PolarPlot and ListPolarPlot have been added to the built-in Mathematica ...

Arrowheads[spec] is a graphics directive specifying that arrows that follow should have arrowheads with sizes, positions, and forms specified by spec.

Arrow[{pt_1, pt_2}] is a graphics primitive that represents an arrow from pt_1 to pt_2.Arrow[{pt_1, pt_2}, s] represents an arrow with its ends set back from pt_1 and pt_2 by ...

Fibonacci[n] gives the Fibonacci number F_n. Fibonacci[n, x] gives the Fibonacci polynomial F_n (x).