Recent content by RicoB

There's a brief chapter in Eugene Hecht book "Optics" which explain it. I hope it might help. Best regards

"A set S of (necessarily square) matrices is said to be closed under multiplication if AB∈ S whenever A, B ∈ S." Perhaps you mean that the multiplication of 2 matrices of the same type will give as result a matrix of the same type.If that's so, then all triangular matrices are closed under...

Let us take, for example, a generator function of type 2 (please see goldstein), i.e , F2(q,P,t) function of the old coordinates (q) and the new momenta (P), and consider the following non-relativistic transformation: x=x'+Vt , x'- new (spacial) coordinate t=t' , (time remains the same)...