Branes and wrapping rules

Key words Branes, supersymmetry, string theory, supergravity. We show that the solitonic branes of ten-dimensional IIA/IIB string theory must satisfy, upon toroidal com-pactification, a specific wrapping rule in order to reproduce the number of half-supersymmetric solitonic branes that follows from a supergravity analysis. The realization of this wrapping rule suggests that IIA/IIB string theory contains a whole class of so-called “non-standard ” Kaluza-Klein monopoles. © 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim