Orbifolds of M-Theory and String Theory
Abstract
It is shown that many of the conjectured dualities involving orbifold compactification of M-theory follow from the known dualities involving M-theory and string theory in ten dimensions, and the ansatz that orbifolding procedure commutes with the duality transformation. This ansatz also leads to a new duality conjecture, namely that M-theory compactified on T8/Z2 is dual to type I string theory on T7. In this case the `twisted sector states' in M-theory live on sixteen membranes transverse to the internal manifold.
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