Nonlinear parabolic equation of higher order

nonlinear wave equation of fourth order

Three dinensional nonlinear parabolic equation of higher order

fourth order parabolic equation

differential equation of fourth order

non-linear delay differential equation of fourth order

complete-nonlinear parabolic equation

Doubly nonlinear parabolic equation

equation of nonlinear vibration

fourth order nonlinear boundary value problem

Fourth order nonlinear wave equation

fourth order nonlinear wave equations

nonlinear equation of bone-remodeling

nonlinear fourth order differential equation

nonlinear fourth-order boundary value problems

nonlinear fourth-order differential equation

nonlinear parabolic equation

set of nonlinear equation

system of nonlinear equation