JAMES C. ROBINSON ... 2004. Information on this title: www.cambridge.org/9780521826501 ... 9 First order linear equations and the integrating factor. 75 ..... ∂2u j. ∂x2. 3. ] +. ∂p. ∂xj. = fj. (3.1). (one for each component, j = 1,2,3) and. ∂u1.
http://web.sonoma.edu/users/m/minor/2018fall241/An_Introduction_to_Ordinary_Differential_Equations_Robinson.pdf