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Testing should help to insert new bugs or how to modify programs predictably?
(University of Hertfordshire, 1992)
Software maintenance is often regarded as consisting of two different activities, fixing bugs and modifying the code to adapt to changing requirements. We argue that these activities are really two faces of the same coin, ...
Automatic Hessians by reverse accumulation
(1992)
Let n be the number of independent variables of a function f, and let W and S respectively be the time and space bounds for the joint evaluation of {f, f} using automatic differentiation with reverse accumulation. In this ...
Reverse accumulation and accurate rounding error estimates for taylor series coefficient
(1992)
We begin by extending the technique of reverse accumulation so as to obtain gradients of univariate Taylor series coefficients. This is done by re-interpreting the same formulae used to reverse accumulategradients in the ...
Why is software development so difficult to manage?
(University of Hertfordshire, 1992)
Software is extremely complex, invisible and easy to change. Because it's so plastic, it's tempting to make lots of changes. Software is also an amazingly unforgiving medium with which to work. Changes to software frequently ...