Riemann Sphere - Extended Complex Numbers

The extended complex numbers consist of the complex numbers C together with ∞. The extended complex numbers may be written as C ∪ {∞}, and are often denoted by adding some decoration to the letter C, such as

Geometrically, the set of extended complex numbers is referred to as the Riemann sphere (or extended complex plane).

Read more about this topic:  Riemann Sphere

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