Root of Unity/Examples/Square Root

Examples of Roots of Unity

Let $F$ be a field.


The square roots of unity of $F$ are defined as:

$U_2 = \set {z \in F: z^2 = 1}$


Sources

  • 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): root of unity
  • 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): root of unity
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