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

Tuples[list, n] generates a list of all possible n-tuples of elements from list. Tuples[{list_1, list_2, ...}] generates a list of all possible tuples whose i\[Null] ...

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 ...

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 ...

Delimiter represents a delimiter to be displayed in objects such as PopupMenu and Manipulate.

Solving equations involving power series. Here is a power series. This gives an equation involving the power series.

p ... or RepeatedNull[p] is a pattern object that represents a sequence of zero or more expressions, each matching p.

Xnor[e_1, e_2, ...] is the logical XNOR (not XOR) function. It gives True if an even number of the e_i are True, and the rest are False. It gives False if an odd number of ...

Append[expr, elem] gives expr with elem appended.