Contents
1. Introductio n 1
2. Th e anti-sel f dua l equation s 10
3. Graftin g theorem s 2 5
4. Deformation s t o anti-sel f dualit y I 3 4
5. Deformation s t o anti-sel f dualit y I I 4 6
6. Metric s wit h W
+
= 0 5 5
7. Graftin g metric s 6
8. Deformin g th e metri c 7 0
9. Strateg y fo r connec t sum s 7 6
10. Ope n question s 8 4
References 8 8
