TY - BOOK AU - Berhanu, Shiferaw AU - Cordaro, Paulo D AU - Hounie, Jorge TI - An introduction to involutive structures SN - 9780521878579 SN - 200827429 U1 - 515.63 BER PY - 2008/// CY - Cambridge PB - Cambridge University Press KW - Approximation theory KW - Bivectors KW - Differential equations, Partial KW - Vector fields N1 - Includes bibliographical references (p. 381-389) and index ER -