DaysBetween[{year_1, month_1, day_1}, {year_2, month_2, day_2}] gives the number of days between the dates {year_1, month_1, day_1} and {year_2, month_2, day_2}. ...

This package provides a unified treatment of the basic calendar operations. The main idea is to treat the calendar as a generalized number system, so that days, weeks, ...

The precedence of any new notation or operator is determined by examining the components from which it is constructed. For instance, +_ ℛ is grouped according to the ...

Mathematica 's differential equation solving functions can be applied to many different classes of differential equations, automatically selecting the appropriate algorithms ...

An efficient load-on-demand mechanism makes hundreds of gigabytes of carefully curated and continually updated data immediately available inside Mathematica for use in ...

CharacteristicFunction[dist, t] gives the characteristic function for the symbolic distribution dist as a function of the variable t.CharacteristicFunction[dist, {t_1, t_2, ...

ChiDistribution[\[Nu]] represents a \[Chi] distribution with \[Nu] degrees of freedom.

DateListPlot[{{date_1, v_1}, {date_2, v_2}, ...}] plots points with values v i at a sequence of dates.DateListPlot[{v_1, v_2, ...}, datespec] plots points with dates at equal ...

DateString[] gives a string representing the complete current local date and time. DateString["elem"] gives the specified element or format for date and ...

Fit[data, funs, vars] finds a least-squares fit to a list of data as a linear combination of the functions funs of variables vars.