An efficient code for calculation of the 6C, 9C and 12C symbols for C3vC3v, TdTd, and OhOh point groups

A new code designed to calculate the 6C, 9C, and 12C   symbols for C3vC3v, TdTd, and OhOh point groups is presented. The program is based on an algorithm that uses the symmetry property between pair and impair representations. This algorithm allows one to speed up the C-symbols calculation and increase the efficiency of spectroscopic programs based on the irreducible tensorial formalism.Program summaryProgram title: 6912CCatalogue identifier: AEKZ_v1_0Program summary URL:http://cpc.cs.qub.ac.uk/summaries/AEKZ_v1_0.htmlProgram obtainable from: CPC Program Library, Queenʼs University, Belfast, N. IrelandLicensing provisions: Standard CPC licence, http://cpc.cs.qub.ac.uk/licence/licence.htmlNo. of lines in distributed program, including test data, etc.: 1214No. of bytes in distributed program, including test data, etc.: 22 097Distribution format: tar.gzProgramming language: C++Computer: Any computer with C, C++ compilerOperating system: Linux SUSE, Windows XP64RAM: 400 KbClassification: 4.2, 16.2, 16.3Nature of problem: Spectroscopy of symmetric atmospheric molecules.Solution method: The program is based on an algorithm that uses the symmetry property between pair and impair representations.Running time:   The test program provided takes a few seconds for C3vC3v, a few minutes for TdTd and a few days for OhOh.