His three main, somewhat overlapping, periods were: the limit laws period, the great period of additive processes and of martingales painted in pathtime colours, and the Brownian pathfinder period.
Kanyang tatlong pangunahing, tila magkasanib-sanib, ng panahon ay: ang limitasyon ng mga batas ng panahon, ang magandang panahon ng additive at proseso ng martingales ipininta sa pathtime watawat, at ang Brownian ng landas ng panahon.