18 Permission to guess
If you are lucky, floats can sometimes guess an answer faster than unums can find it with rigorous methods. Unums face two more challenge problems from Professor Kahan in this chapter. Are you feeling lucky?
18.1 Algorithms that work for floats also work for unums
Unums do not discard the vast accumulated literature about how to compute with floats. Unums are a superset of floats. Floats are simply unums for which the ubit is zero. Up to now, we have ignored this because of the importance of showing examples where rigorous answers are possible for the first time, using set computation with ranges of real values instead ...
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