Chapter 1. Partial Differential Equations
twister.ou.edu › CFD2003 › Chapter14. Canonical or standard forms of PDE's 4.1. Three Canonical or Standard Forms of PDE's Every linear 2nd-order PDE in 2 independent variables, i.e., Eq.(1) can be converted into one of three canonical or standard forms, which we call hyperbolic, parabolic or elliptic. Written in new variables ξ and η, the three forms are: uξξ - uηη + …. = 0
Classification of Partial Differential Equations and Canonical ...
www.iist.ac.in › people › IN08026• a =c =0 corresponds to the first canonical form of hyperbolic PDE given by wξη=ψ ξ,η,w,wξ,wη (10a) • b =0, c =−a corresponds to the second canonical form of hyperbolic PDE given by wαα− wββ=ψ α,β,w,wα,wβ (10b) • a =b =0 corresponds to the canonical form of parabolic PDE given by wηη=ψ ξ,η,w,wξ,wη (11)