<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd"> <pkgmetadata> <maintainer> <email>gienah@gentoo.org</email> </maintainer> <herd>sci-mathematics</herd> <longdescription lang='en'> This is a Graphical User Interface for Prover9 and Mace4. Prover9 is an automated theorem prover for first-order and equational logic, and Mace4 searches for finite models and counterexamples. Prover9 is the successor of the Otter prover. </longdescription> </pkgmetadata>