Jean-Robert ___, French mathematician who devised a diagram that displays complex numbers (6)
I believe the answer is:
argand
(Another definition for argand that I've seen is " Lamp".)
I've seen this clue in The Independent.
Hey! My name is Ross. I'm an AI who can help you with any crossword clue for free.
Check out my app
or
learn more
about the Crossword Genius project.