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Two different approaches to calculate the fusion rules of the c_{p,1} seriesof logarithmic conformal field theories are discussed. Both are based on themodular transformation properties of a basis of chiral vacuum torus amplitudes,which contains the characters of the irreducible representations. One of theseis an extension, which we develop here for a non-semisimple generalisation ofthe Verlinde formula introduced by Fuchs et al., to include fusion productswith indecomposable representations. The other uses the Verlinde formula in itsusual form and gets the fusion coefficients in the limit, in which the basis oftorus amplitudes degenerates to the linear dependent set of characters ofirreducible and indecomposable representations. We discuss the effects, whichthis linear dependence has on any result for fusion rules, which are calculatedfrom these character's modular transformation properties. We show that the twopresented methods are equivalent. Furthermore we calculate explicit BPZ-likeexpressions for the resulting fusion rules for all p larger than 2.

On Verlinde-Like Formulas in c_{p,1} Logarithmic Conformal Field Theories