How much a problem amplifies error in its input. Separates a badly behaved problem from a badly written algorithm, which is a distinction worth making before optimising either.
supersedescorrects · extends
classifiesspecializes · part-of
substitutes forapproximates · alternative-to
depends onrequires · validates
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validatesis a test for Floating-Point Arithmeticbounds how much accuracy a result can possibly retain