This is Perl module Imager::Math::Graph.
INSTALLATION
Imager::Math::Graph installation is straightforward. If your CPAN shell is set up,
you should just be able to do
% cpan Imager::Math::Graph
Download it, unpack it, then build it as per the usual:
% perl Makefile.PL
% make && make test
Then install it:
% make install
DOCUMENTATION
Imager::Math::Graph documentation is available as in POD. So you can do:
% perldoc Imager::Math::Graph
to read the documentation online with your favorite pager.
Junichiro Tobe