(AN Automated Tool for higher-order Amplitude geneRation) is a Mathematica package designed for multi-loop computations in physics.
: While often spelled "Annatar" (the "Lord of Gifts"), it is sometimes phonetically searched as "Anatar." This was the fair disguise used by Sauron in the Second Age to deceive the Elves of Eregion into forging the Rings of Power. ANATAR
: It integrates existing tools like QGRAF for generating Feynman diagrams and FORM for performing Dirac and color algebras. (AN Automated Tool for higher-order Amplitude geneRation) is