GreenFunction[{u””[x] – b^4*u[x], u”[0] == 0, u”'[0] == 0, u”[1] == 0, u””[1] == 0}, u[x], {x, 0, 1}, y] Actually, i am trying to find the green function of a linear fourth order differential equation using Mathematica. But seems like I am not getting any results by using Mathematica predefined function “GreenFunction “Read more