His mathematical researches began while he was still an undergraduate and he wrote a paper on the sine integral, cosine integral, and exponential integral, giving tables of these integrals which he had computed himself.
Matematiko kanyang pananaliksik ay nagsimulang habang siya ay nanatiling isang undergraduate at siya wrote isang papel sa sain mahalaga, cosine mahalaga, at pagpaparami mahalaga, pagbibigay ng mga talahanayan ng mga integrals na niya computed kanyang sarili.