PASS general cutoff: alpha^2=2vol; beta^2=2(1-R_x)vol; alpha beta=R_y vol
PASS normalized canonical form: O^2=0; O conjugate(O)=4vol
PASS core J^2=-I and J-anti-invariance of alpha,beta
PASS core N_J(partial_u,partial_x)=-eps/(2(1-eps*x)) partial_u
