(j,m)-core inverse (p,q,m)-core inverse CIR model Cauchy problem Chinese language CoES DC pension plan DMP-inverse Gerber–Shiu function HARA HJB equation Hamilton–Jacobi–Bellman equation Laguerre series M-CEV model Maria Ondina Braga Poisson process ambiguity aversion ambiguity-aversion automobile insurance bidimensional perturbed risk model change in time chronicle common shock dependence consumer studies core inverse core-EP inverse correlated brownian motions default risk dividend payment emergency fund