Separate the pieces of a pile or matrix column.

Move backwards horizontally n 1/100s of an em.

Change to bold font.

Center-align a column of a matrix.

Make a centered pile (same as pile).

Create a name for a frequently used string.

Define two characters to mark the left and right ends of an eqn equation to be printed inline. Use delim off to turn off delimiters.

Move down n 1/100s of an em.

Widen the current font by overstriking it.

Change to font x, where x is the name or number of a font.

Used in summations, integrals, and similar constructions to signify the lower limit.

Move forward horizontally n 1/100s of an em.

Set a global font x for all equations.

Set a global size for all equations.

Change to italic font.

Left-justify a column of a matrix.

Create big brackets, big braces, big bars, etc.

Line up marks in equations on different lines.

Left-justify the elements of a pile.

Remember the horizontal position in an equation. Used with lineup.

Create a matrix.

Create a definition that takes effect only when neqn is running.

Make a fraction.

Make a vertical pile with elements centered above each other.

Right-adjust a column of a matrix.

Create big brackets, big braces, big bars, etc. Must have a matching left.

Set following constant in roman.

Right-justify the elements of a pile.

Change the size of the font to n.

Take the square root of the following equation element.

Start a subscript.

Start a superscript.

Make a definition that applies only to eqn.

Used in summations, integrals, and similar constructions to signify the upper limit.

Move up n 1/100s of an em.

Force extra space into the output.

Force a space one-half the size of the space forced by ~.

Force eqn to treat an element as a unit.

A string within quotes is not subject to alterations by eqn.