Hyperbolic Quaternions

Some articles on hyperbolic quaternions, quaternions, hyperbolic, hyperbolic quaternion:

Musean Hypernumber - Conic Sedenions / "16 Dimensional M-algebra" - List of Number Types and Their Isomorphisms - Hyperbolic Quaternions
... Hyperbolic quaternions after Mus├Ęs, to bases {} are isomorphic to coquaternions (split-quaternions) ... They are different from Alexander Macfarlane's hyperbolic quaternions (first mention in 1891), which are not associative ...
Hyperbolic Quaternion - Historical Review
... An example of a one-parameter group is the hyperbolic versor with the hyperbolic angle parameter ... But it is a startling aspect of finite mathematics that makes the hyperbolic quaternion ring different The basis of the vector space of hyperbolic quaternions is not closed under ... where he says his vector system is simply the elements of Quaternions without quaternions, with the notation simplified to the uttermost, and with the very inconvenient minus sign before scalar product done ...