There is a whole discipline in this matter. You should look for numerical analysys (http://en.wikipedia.org/wiki/Numerical_analysis http://en.wikipedia.org/wiki

There is a whole discipline in this matter. You should look for numerical analysys (http://en.wikipedia.org/wiki/Numerical_analysis http://en.wikipedia.org/wiki/Numerical_analysis). Start with this and you can make algos to resolve the problems.