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02/18/05 02:26am

In system defined functions we can have parameters like WorkingPrecision or PrecisionGoal. However, if we need to call some self-defined function when using the system defined function, for example, FindRoot[g[x], {x,x0}, WorkingPrecision->30, PrecisionGoal->20...], it will ordinarily give a warning message "...argument precision is less than WorkingPrecision..". So, my question is, how can I set the precision of all the variables and funtions (self-defined) to be some high number?


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