We provide an elementary and self-contained derivation of formulae for products and ratios of characteristic polynomials from classical groups using classical results due to Weyl and Littlewood.
Moments of the logarithmic derivative of characteristic polynomials from $SO(N)$ and $USp(2N)$
On the Euler angles for the classical groups, Schwinger approach and Isoscalar factors for SU (3)
On the moments of characteristic polynomials
