eqn

Equation preprocessor for the groff (GNU Troff) document formatting system. See also troff and groff. More information: https://manned.org/eqn.

• Process input with equations, saving the output for future typesetting with groff to PostScript:

eqn path/to/input.eqn > path/to/output.roff

• Typeset an input file with equations to PDF using the me macro package:

eqn -T pdf path/to/input.eqn | groff -me -T pdf > path/to/output.pdf