He went to the United States to complete his research and was awarded a Master of Arts and then a Ph.D. from Princeton University in 1947 for his thesis Ultrafilters and Compactification of Uniform Spaces.
Siya ang nagpunta sa Pilipinas upang makumpleto ang kanyang mga pananaliksik at noon ay iginawad ng isang Master ng Sining at pagkatapos ay isang Ph.D. mula sa Princeton University sa 1947 para sa kanyang tesis Ultrafilters at Compactification Uniform ng mga puwang.