String networks and supersheets

As was shown by Aharony, Hanany and Kol and independently by Sen, type IIB string theory admits configurations where strings of different charges (p_i, q_i) form so-called string networks. We argue that these networks blow up into "supersheets": supersymmetric spinning cylindrical D3-branes carrying electric and magnetic fluxes. These supersheets are three-dimensional generalizations of the supertubes that were constructed by Mateos and Townsend. We calculate the mass of both systems for arbitrary values of the parameters and find exact agreement.