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.
Locally flat embeddings of 3-manifolds in S4. J.A.Hillman. The University of Sydney. Email address: jonathan.hillman@sydney.edu.au. Contents. Preface vii. Chapter 1. Preliminaries 1. 1.1. Groups 1. 1.2. Homological group theory 1. 1.3. Bilinear
Locally flat embeddings of 3-manifolds in S4. J.A.Hillman. The University of Sydney. Email address: jonathan.hillman@sydney.edu.au. Contents. Preface vii. Chapter 1. Preliminaries 1. 1.1. Groups 1. 1.2. Homological group theory 1. 1.3. Bilinear