Sources I consulted:
- https://en.wikipedia.org/
- https://mathworld.wolfram.com/
In mathematics, complex geometry is the study of geometric structures and constructions arising out of, or described by, the complex numbers. The most immediate space is the Euclidean plane with suitable coordinates, which is then called complex plane or Argand diagram, named after Jean-Robert Argand. His book, Essai sur une manière de représenter les quantités imaginaires dans les constructions géométriques (Paris Gauthier-Villars, 1874). While Argand (1806) is generally credited with the discovery, the Argand diagram (also known as the Argand plane) was actually described by C. Wessel prior to Argand. Historically, the geometric representation of a complex number as a point in the plane was important because it made the whole idea of a complex number more acceptable. In particular, this visualization helped "imaginary" and "complex" numbers become accepted in mainstream mathematics as a natural extension to negative numbers along the real line.
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