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Hopf Fibration Explorer

Discover one of the most beautiful objects in mathematics through 15 interactive demonstrations. See how every point on a sphere corresponds to a circle in 3-space, and why every pair of these circles is linked.

See also: Topology for fibrations and homotopy groups, Lie Groups for the underlying SU(2) to S² quotient structure, and Differential Geometry for the smooth fiber bundle structure on S³.

  1. 01

    Fibers & Great Circles

    Understand S¹ fibers over S² and how every point on the 2-sphere corresponds to a circle in 3-space

    3 demos
  2. 02

    Stereographic Projection

    Map the 3-sphere into 3D space and see how fibers become circles and lines

    3 demos
  3. 03

    The Full Fibration

    Visualize dozens of fibers simultaneously, colored by their base point on S²

    3 demos
  4. 04

    Linking & Topology

    Discover why every pair of fibers is linked exactly once — a topological invariant

    3 demos
  5. 05

    Interactive Explorer

    Click points on S² and watch their fibers appear in real time — build your own fibration

    3 demos

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