0 On supersymmetric solutions in D = 11 supergravity with Ricci - flat internal spaces
نویسنده
چکیده
An introduction to supersymmetric (SUSY) solutions defined on the product of Ricci-flat spaces in D = 11 supergravity is presented. The paper contains some background information: (i) decomposition relations for SUSY equations and (ii) 2 −k-splitting theorem that explains the appearance of N = 2 −k fractional supersym-metries. Examples of M 2 and M 5 branes on the product of two Ricci-flat spaces are considered and formulae for (fractional) numbers of unbroken SUSY are obtained.
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