A quaternion

Quaternion math

  1. Overview
  2. A brief history
  3. Numbers 101 site
  4. Multiplying the easy way
  5. Products
  6. Scalars, vectors, tensors, and all that
  7. Complex quaternions A long essay that starts from the trivial group and builds out to numbers appropriate for space-time events, including a small variation on quaternions.
  8. Quaternion analysis
  9. Equivalence classes in space-time
  10. Topology
  11. Where quaternions fit in math
  12. Tools