Mathematica allows convenient discovery and customization of all aspects of its system setup.

"SelectionSetFind" is a front end token that places the selected string into the Search for: field of the Find dialog.

lhs ^:= rhs assigns rhs to be the delayed value of lhs, and associates the assignment with symbols that occur at level one in lhs.

GeneralizedLinearModelFit[{y_1, y_2, ...}, {f_1, f_2, ...}, x] constructs a generalized linear model of the form g -1 (\[Beta]_0 + \[Beta]_1 f_1 + \[Beta]_2 f_2 + ...) that ...

Mathematica allows almost every aspect of sessions to be customized, under full programmatic control.

ZeroTest is an option to various linear algebra functions that gives a function to use in testing whether symbolic expressions should be treated as zero.

General issues about the internal implementation of Mathematica are discussed in "The Internals of Mathematica". Given here are brief notes on particular features. These ...

SystemOptions["name"] gives the current setting for the internal system option with the specified name.SystemOptions[] gives the current settings for all settable internal ...

Building on its broad algorithmic and mathematical capabilities, Mathematica provides a unique level of highly general and efficient support for additive number theory.

Mathematica contains the world's largest collection of number theoretic functions, many based on specially developed algorithms.