Characters["string"] gives a list of the characters in a string.

One significant advantage Mathematica provides is that it can symbolically compute derivatives. This means that when you specify Method->"Newton" and the function is ...

If you represent the n^th term in a sequence as a[n], you can use a recurrence equation to specify how it is related to other terms in the sequence. RSolve takes recurrence ...

DiscreteIndicator[x, x_1, {u_1, u_2, ...}] yields the discrete indicator function, equal to 1 if x = x_1 and 0 if x = u_i for any i.

DiagramPlot[{{x_1, y_1}, {x_2, y_2}, ...}] plots the Voronoi diagram of the points {{x_1, y_1}, ...}. DiagramPlot[{{x_1, y_1}, {x_2, y_2}, ...}, {q_1, q_2, ...}, val] plots ...

Constants is an option for Dt which gives a list of objects to be taken as constants.

This does an integral over the interior of the unit circle. Here is an equivalent form. Even though an integral may be straightforward over a simple rectangular region, it ...

RandomChoice[{e_1, e_2, ...}] gives a pseudorandom choice of one of the e_i. RandomChoice[list, n] gives a list of n pseudorandom choices. RandomChoice[list, {n_1, n_2, ...}] ...

Sequence[expr_1, expr_2, ...] represents a sequence of arguments to be spliced automatically into any function.

Split[list] splits list into sublists consisting of runs of identical elements. Split[list, test] treats pairs of adjacent elements as identical whenever applying the ...