Named after a Swiss mathematician, what is the term for the geometric representation of complex numbers where the x-axis is real and the y-axis is imaginary?

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Argand diagram

The Argand diagram is named after Jean-Robert Argand, an amateur mathematician who published the concept in 1806 to visualize complex numbers as points in a 2D plane. It treats the horizontal axis as real numbers and the vertical axis as imaginary numbers, effectively turning abstract algebra into tangible geometry. Interestingly, while named after Argand, the concept was actually first described by Caspar Wessel nearly a decade earlier.

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Named after a Swiss mathematician, what is the term for the geometric representation of complex numbers as points in a 2D plane with real and imaginary axes?

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