death_place death_date birth_place nationality fields birth_date known_for article_title name
suzhou , china 30 june 1817 suzhou , china chinese mathematics 8 december 1768 descartes ' rule of signs li rui -lrb- mathematician -rrb-
 li rui
li rui -lrb- mathematician -rrb-

li rui -lrb- ; 8 december 1768 suzhou -- 30 june 1817 suzhou -rrb- was a chinese mathematician .
li discovered independently an equivalent version of what is known today as descartes ' rule of signs .
