Abstract The low-energy expansion of one-loop amplitudes in type II string theory generates a series of world-sheet integrals whose integrands can be represented by world-sheet Feynman diagrams. These integrands are modular invariant and understanding the structure of the action of the modular Laplacian on them is important for determining their contribution to string scattering ampli... https://www.getpureroutine.com/mega-sale-caruso-s-pee-less-for-men-60-tablets-sale-top-super/