Undetermined coefficients

guessing a particular solution when g(t) is a polynomial or (polynomial)e^kt

Undetermined with complex roots, higher-order linear DE

nonhomogeneous 2nd order linear DE with constant coefficients when g(t) = polynomial times cos(wt) or sin(wt) - higher order linear DE: homogeneous or nonhomogeneous (with constant coefficients) - Annihilator

Annihilator Method, Euler's equation

annihilator method to determine a form of the particular solution phi - Euler's equation and how to solve it

Cauchy-Euler, Green's function, intro to system

How to solve a Cauchy-Euler equation - Def. of Green's function and its use - Intro. to a system of linear DEs

Higher order nonlinear DEs

Matching up the coefficients in the answers of a linear system of DEs - Higher order nonlinear DEs where either dependent or independent variable is missing completely from the equation