Aspinwall, PS, *Some relationships between dualities in string theory*,
Nuclear Physics B Proceedings Supplements, vol. 46 no. 1-3
(January, 1996),
pp. 30-38, Elsevier BV [doi] .
**Abstract:**

*Some relationships between string theories and eleven-dimensional supergravity are discussed and reviewed. We see how some relationships can be derived from others. The cases of N = 2 supersymmetry in nine dimensions and N = 4 supersymmetry in four dimensions are discussed in some detail. The latter case leads to consideration of quotients of a K3 surface times a torus and to a possible peculiar relationship between eleven-dimensional supergravity and the heterotic strings in ten dimensions.*