Since any Z-torsion-free module over such a ringis free it follows easily that M is conjugate to A, B or B2. ... The normalizers in SL(2,Z) of the subgroups generated by A, B or B2 areeasily seen to be finite cyclic.
15TH ANNUAL AUSTRALIAN POULTRY SCIENCE SYMPOSIUM. SYDNEY, NEW SOUTH WALES. 10 – 12 FEBRUARY 2003. Organised by. THE POULTRY RESEARCH FOUNDATION (University of Sydney). and. THE WORLD’S POULTRY SCIENCE ASSOCIATION. (Australian Branch). Papers