Recent content by gankutsuou7

Dim(V)>1.Prove that PGL(V) acts two transitively but not 3 transitively on P(V) projective space.

Every second order linear ODE a(x)y''+b(x)y'+c(x)y=F(x) can be transformed into the forms; u''+g(x)u=h(x) divide whole equation to a(x) and choose y(x)=u(x)^(e^s(x)) but how i choose s(x) ?Please help...