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It is proved in article, that from point of numbers and new scalar work of diagonal of arbitrary rhombus it is possible to consider identical as a result of the orthogonal transformation, when lengths of vectors are measured in the same units of measuring as on sides of the rhombus. In the second part of article some class of functions is resulted: the values of the functions restore on the known positive values of the transform of Laplace. In the third part of article the examples are resulted, when a function of points of complex plane become periodic with the arbitrary period (from point of some introduction of two systems of co-ordinates).