We compactify M-theory on a Calabi-Yau manifold to five dimensions by wrapping the membrane and fivebrane solitons of the eleven-dimensional supergravity limit around Calabi-Yau two-cycles and four-cycles, respectively. We identify the perturbative and non-perturbative BPS states thus obtained with those of heterotic string theory compactified on K3 × S1. Quantum aspects of the five-dimensional theory are discussed.
Ferrara, S., Khuri, R. R., & Minasian, R. (1996). M-theory on a Calabi-Yau manifold. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 375(1–4), 81–88. https://doi.org/10.1016/0370-2693(96)00270-5