eqn(1)                                                     eqn(1)



NAME
     eqn, checkeq - format mathematical text for troff

SYNOPSIS
     eqn [-dxy] [-fn] [-pn] [-sn] [-Ttty-type] [-] [file]...

     checkeq [file]...

ARGUMENTS
     -    Causes eqn to read the standard input.

     -dxy Sets delimiters to characters x and y with the
          command-line argument -dxy or (more commonly) with
          delim xy between .EQ and .EN.  The left and right
          delimiters may be the same character, the dollar sign
          often being used as such a delimiter.  Delimiters are
          turned off by delim off.  All text that is neither
          between delimiters nor between .EQ and .EN is passed
          through untouched.

     -fn  Specifies the font to be used.  Replace n with the
          desired font.

     file Specifies the file to be formatted.  If this option is
          not given, eqn will read the standard input.

     -pn  Specifies the point size of the equation.  Replace n
          with a point size.  The legal point size numbers are:

             6  7  8  9  10  11  12  14
             16  18  20  22  24  28  36

     -sn  Specifies the size the equation.

     -Ttty-type
          Causes eqn to prepare output for the specified output
          device, tty-type.  The currently supported devices are
          -Taps (Autologic APS-5) and -Tpsc (POSTSCRIPT device).
          The default is -Tpsc.

DESCRIPTION
     eqn is a troff(1) preprocessor for typesetting mathematical
     text on a phototypesetter.  Normal usage is

        eqn [options] file ... | troff [options] | [typesetter]

     A line beginning with .EQ marks the start of an equation; a
     line beginning with .EN marks the end of an equation; troff
     does not alter these lines, so they may be defined in macro
     packages to get centering, numbering, and so forth.  You may
     also name two characters as delimiters; eqn treats
     subsequent text between delimiters as input.



January 1992                                                    1

eqn(1)                                                     eqn(1)



     checkeq is a related program that reports missing or
     unbalanced delimiters and .EQ/.EN pairs.

     Tokens within eqn are separated by spaces, tabs, newlines,
     braces, double quotation marks, tildes, and circumflexes.
     Braces ({}) are used for grouping; generally, wherever a
     single character such as x may be used, then x enclosed in
     braces may be used instead.  A tilde (~) represents a full
     space in the output; a circumflex (^) half as much.

     For full details, see ``eqn Reference'' in A/UX Text
     Processing Tools.

LIMITATIONS
     To boldface digits, parentheses, and so forth, it is
     necessary to enclose them in quotation marks, as in

        bold "12.3"

     When you use eqn with the mm macro package, displayed
     equations must appear only inside displays.

     See also LIMITATIONS under troff(1).

FILES
     /bin/checkeq
          Executable file
     /bin/eqn
          Executable file

SEE ALSO
     mm(1), mmt(1), nroff(1), tbl(1), troff(1)

     eqnchar(5), mm(5), mv(5) in A/UX Programmer's Reference

     ``eqn Reference'' in A/UX Text Processing Tools



















2                                                    January 1992