... constituted the starting point of a basic theory of integration of partial differential equations which, through the work of Jacobi, Lie, and others, has developed into a modern Cartan calculus of extreme differential forms.
... constituted ang panimulang punto ng isang pangunahing teorya ng pagkakabuo ng mga bahagi ng kaugalian equation na kung saan, sa pamamagitan ng gawain ng Jacobi, humiga / magsinungaling, at iba pa, ay binuo sa isang makabagong Cartan calculus ng matinding kaugalian form.