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Mathematical models of growth have been developed a long period of time. Estimating the lag time in the growth process is a practically important problem. In this note we provide estimates for the one–sided Hausdorff approximation () of the shifted step–function by sigmoidal function arising from Box–Cox transformation. We present a software module (intellectual property) within the programming environment of CAS Mathematica for analysis of growth curves. Numerical examples, illustrating our results are given, too.
Nikolay Kyurkchiev, nkyurk@math.bas.bg, Institute of Mathematics and Informatics, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 8, 1113 Sofia, Bulgaria
Anton Iliev, aii@uni-plovdiv.bg, Faculty of Mathematics and Informatics, Paisii Hilendarski University of Plovdiv, 24 Tsar Assen Str., 4000 Plovdiv, Bulgaria
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