Assertion: complex number's form | /r/HasProperty | introduced by rené descartes
Facets:
value: in his text
type: LOCATION
value: early in the 17th century
type: TEMPORAL
Source sentences:
text: Early in the 17th century, the first form of our modern exponential notation was introduced by René Descartes in his text titled La Géométrie; there, the notation is introduced in Book I.