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A unit sphere is a mathematical concept that refers to the set of points in a given space that are at a unit distance (usually 1) from a central point, called the center of the sphere. In different dimensions, the unit sphere can be defined as follows: 1. **In 2 dimensions (2D)**: The unit sphere is a circle of radius 1 centered at the origin (0, 0) in the Cartesian plane.

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  1. Functional analysis
  2. Fields of mathematical analysis
  3. Mathematical analysis
  4. Fields of mathematics
  5. Mathematics
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