Almost nothing can, it seems, be learned of Argand's private life, except that in all probability he was born at Geneva in 1768.
Argand's work remained unnoticed until the question was again raised in Gergonne's Annales, 1813, by J.
Argand's method may be put, for reference, in the following form.
Argand's attempts to extend his method to space generally were fruitless.
Something far more closely analogous to quaternions than anything in Argand's work ought to have been suggested by De Moivre's theorem (1730).