>Are you sure? yes >Dyson never got his PhD degree. >By the way, do you know that there is a series in scattering theory in quantum mechanics called Dyson se

>Are you sure? yes >Dyson never got his PhD degree. >By the way, do you know that there is a series in scattering theory in quantum mechanics called Dyson series? indeed i do; i studied it in perturbation theory in undergrad. >To be frank, I doubt if you know this. this isn't grammatically correct. "i doubt you know this/that".