Seki also discovered Bernoulli numbers before Jacob Bernoulli . He studied equations treating both positive and negative roots but had no concept of complex numbers.
Sheryn din natuklasan Bernoulli numero bago Jacob Bernoulli. He-aral ng equation pagpapagamot ng parehong positibo at negatibong Pinagmulan ngunit nagkaroon na walang konsepto ng mga kumplikadong numero.