ISBN-13: 9780828402217 / Angielski / Twarda / 1969 / 542 str.
In its simplest form, the Pfaff problem (formulated by Pfaff in 1819) consists of determining the maximal integrable manifold of a Pfaffian system, that is of a system of vector fields in $R^n$. This book offers a solution of this problem and discusses var