DateDifference[date_1, date_2] gives the number of days from date_1 to date_2.DateDifference[date_1, date_2, " unit"] gives the difference between date_1 and date_2 in the ...
DocumentNotebook[{cell_1, cell_2, ...}] represents a complete document notebook in the Mathematica front end.
InverseWeierstrassP[p, {g_2, g_3}] gives a value of u for which the Weierstrass function \[WeierstrassP] (u; g_2, g_3) is equal to p.
ItemSize is an option for Grid, Column, and related constructs that specifies the sizes to allow for items.
Longest
(Built-in Mathematica Symbol) Longest[p] is a pattern object that matches the longest sequence consistent with the pattern p.
NHoldRest is an attribute which specifies that all but the first argument to a function should not be affected by N.
NMaxValue[f, x] gives the maximum value of f with respect to x.NMaxValue[f, {x, y, ...}] gives the maximum value of f with respect to x, y, .... NMaxValue[{f, cons}, {x, y, ...
NMinValue[f, x] gives the minimum value of f with respect to x.NMinValue[f, {x, y, ...}] gives the minimum value of f with respect to x, y, .... NMinValue[{f, cons}, {x, y, ...
Ratios
(Built-in Mathematica Symbol) Ratios[list] gives the successive ratios of elements in list. Ratios[list, n] gives the n\[Null]^th iterated ratios of list. Ratios[list, {n_1, n_2, ...}] gives the ...
RunScheduledTask[expr] schedules and starts a task that will repeatedly evaluate expr once per second.RunScheduledTask[expr, time] schedules and starts a task that will ...