Glaisher (Built-in Mathematica Symbol)

Glaisher is Glaisher's constant with numerical value \[TildeEqual] 1.28243.

Exchanging Material with the Web (Mathematica Tutorial)

Converting notebooks to HTML. Export has many options applying to HTML export that allow you to specify how notebooks should be converted for web browsers with different ...

Selecting Parts of Expressions with ... (Mathematica Tutorial)

"Manipulating Elements of Lists" shows how you can pick out elements of lists based on their positions. Often, however, you will need to select elements based not on where ...

Typing Square Roots (Mathematica Tutorial)

To get a square root sign, press the Control key and the 2 key at the same time. Press Ctrl+2 or Ctrl+@. Type inside the placeholder (which is already selected).

DiskMatrix (Built-in Mathematica Symbol)

DiskMatrix[r] gives a matrix whose elements are 1 in a disk-shaped region of radius r, and are otherwise 0.DiskMatrix[r, w] gives a w*w matrix containing a disk of 1s with ...

ExpandNumerator (Built-in Mathematica Symbol)

ExpandNumerator[expr] expands out products and powers that appear in the numerator of expr.

Head (Built-in Mathematica Symbol)

Head[expr] gives the head of expr.

Generic and Non-Generic Solutions (Mathematica Tutorial)

If you have an equation like 2x==0, it is perfectly clear that the only possible solution is x->0. However, if you have an equation like ax==0, things are not so clear. If a ...

Defining Numerical Values (Mathematica Tutorial)

If you make a definition such as f[x_]:=value, Mathematica will use the value you give for any f function it encounters. In some cases, however, you may want to define a ...

Manipulating Files and Directories (Mathematica Tutorial)

Functions for manipulating files. Different operating systems have different commands for manipulating files. Mathematica provides a simple set of file manipulation ...