“…) are positively defined symmetric matrices, because in this case, the residuals e y (γ, ξ 0 , t 0 , t) and e z (γ, ξ 0 , t 0 , t), and also y(t) − y , not exceeding in modulus a certain fraction of t age maximum of fluctuations [51,52], and also to simultaneously minimize the function Q , determined by ( 24) for ( ) t y , determined on the basis of ( 11) and (18…”