The SIR program. II. The evaluation and use of two-phase seminvariants

New faster and more accurate procedures for the evaluation of two-phase seminvariants by means of the representation theory are described. Some special relationships are also considered and specific methods for their estimation are proposed. The use of the generalized first representation is discussed and detailed examples are given. These ideas for the evaluation of two-phase seminvariants have been introduced in the SIR program and examples of actual applications are given.