Symbolic programming package N Coperators with applications to theoretical atomic spectroscopy

A symbolic programming package N Coperators with applications to atomic physics is introduced. The package runs over Mathematica and it implements NC Algebra, the noncommutative algebra package. N Coperators features the algebra of irreducible tensor operators, the second quantization representation, the angular momentum theory, and the effective operator approach exploited in many-body perturbation theory, including Wick's theorem. The comprehensiveness is yet another characteristic feature of the present package: The generation of expressions is performed in a way as if it were done by hand. Although the theoretical atomic spectroscopy is a direct target of N Coperators, the package, with minor modifications, if any, is believed to appropriate other areas of theoretical physics as well.