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Last years research gave some preliminary results in approaches to customer online purchase prediction. However, it still remains unclear what exact set of features of data instances should be incorporated in a model and is enough for prediction, what is the best data mining method (algorithm) to use, how stable over time could be such a model, whether a model is transferable from one online store...
Such tasks as clustering, classification, regression, and associative search are viewed as formal tasks Data Mining. Objects presented in the form of multi-dimensional numerical vectors of informative features are initial data. For each of the tasks exist many known algorithms of solving, but they have fundamental differences. The first group is based on calculation of the distance between the images...
This paper examined the spectral properties of quadruple symmetric real functions. Theorem is formulated, under which the complex spectra of such symmetric functions are conjugated. The properties of the trigonometric functions are used in the proof of the theorem. Numerical results are presented for illustrating of the proven theorem.
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