NUMERIC SOLUTION AND TESTING METHODS OF RIGID INTEGRAL-DIFFERENTIAL PROBLEM OF ISOELECTRIC FOCUSING
The article is devoted to solution development of rigid integral-differential problem connected with the model of Isoelectric Focusing (IEF) in so-called “anomalous” regimes. Besides, testing methods of the problem are built. It is found the analytic transformation of the initial integral-differential problem to the ordinary boundary-value problem which is suitable to evaluation by Runge-Kutta’s method. Further, it is overcame the uncontrollable accumulation of calculation errors which are connected with the problem rigidity. It is done by means of solution representation in the special exponential form. For model testing two methods have been developed. They are the asymptotic method and the tangent one. Both of them show the high degree correspondence of numeric and asymptotic solutions.