Решение квантильных дифференциальных уравнений Пфаффа при отсутствии полной интегрируемости
The present work deals with quantile Pfaffian differential equations which are constructed using two-dimensional conditional quantiles of multidimensional probability distributions. As it was shown in  in case when the initial probability distributions have reproducible conditional quantiles this kind of Pfaffian equations is completely integrable and the integral manifold is the conditional quantile of maximum dimension. In this paper we discuss properties of integral manifolds of maximum possible dimension for quantile Pfaffian equations which are not completely integrable. Manifolds of this type are described in terms of conditional quantiles of intermediate dimensions.