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This work describes the computer program EQMOD. This program determines tho expression for the truncation error present in the discretization of partial diferential equations. Such expression is obtained from the modified equation associated with the chosen discretization. The modified equation can be obtained through extensive algebric manipulations. These become cumbersome after a while, making their manual evaluation complicated. However, they can be efficiently performed by a computer running a simbolic manipulation package. Many such packages exist and this work adopted Mathematica. Various examples demonstrate the fu.ncionality and aplicability of the program EQMOD.

Obtenção Automatizada da Expressão do Erro de Truncamento presente na Discretização de Equações Diferenciais Parciais