SetOptions[s, name_1 -> value_1, name_2 -> value_2, ...] sets the specified default options for a symbol s. SetOptions[stream, ...] or SetOptions["name", ...] sets options ...
x_y^z is the low-level box representation for x_y^z in notebook expressions.
TimeConstrained[expr, t] evaluates expr, stopping after t seconds. TimeConstrained[expr, t, failexpr] returns failexpr if the time constraint is not met.
TrigToExp[expr] converts trigonometric functions in expr to exponentials.
UpperCaseQ[string] yields True if all the characters in the string are uppercase letters, and yields False otherwise.
$CharacterEncoding specifies the default raw character encoding to use for input and output functions.
$MachinePrecision gives the number of decimal digits of precision used for machine-precision numbers.
$MinPrecision gives the minimum number of digits of precision to be allowed in arbitrary-precision numbers.
In many kinds of calculations, you may find yourself typing the same input to Mathematica over and over again. You can save yourself a lot of typing by defining a function ...
You can use files on your computer system to store definitions and results from Mathematica. The most general approach is to store everything as plain text that is ...