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H is closed under quaternion multiplication and addition, which makes it a subring of the ring of all quaternions H. Hurwitz quaternions were introduced by Adolf Hurwitz . A Lipschitz quaternion (or Lipschitz integer) is a quaternion whose components are all integers. The set of all Lipschitz quaternions
The set A is a ring (in fact a domain) and a lattice and is called the ring of Hurwitz quaternions. There are 24 unit quaternions in this ring, and they are the vertices of a regular 24 cell with Schläfli symbol {3,4,3}.
The Hurwitz quaternion order is a specific order in a quaternion algebra over a suitable number field.The order is of particular importance in Riemann surface theory, in connection with surfaces with maximal symmetry, namely the Hurwitz surfaces. [1]
Thus, the quaternion components ,,, are either all integers or all half-integers, depending on whether is even or odd, respectively. The set of Hurwitz quaternions forms a ring; that is to say, the sum or product of any two Hurwitz quaternions is likewise a Hurwitz quaternion.
Adolf Hurwitz (German: [ˈaːdɔlf ˈhʊʁvɪts]; 26 March 1859 – 18 November 1919) was a German mathematician who worked on algebra, analysis, geometry and number theory. Early life [ edit ]
The quaternion group has the unusual property of being Hamiltonian: Q 8 is non-abelian, but every subgroup is normal. [4] Every Hamiltonian group contains a copy of Q 8. [5] The quaternion group Q 8 and the dihedral group D 4 are the two smallest examples of a nilpotent non-abelian group.
One chooses a suitable Hurwitz quaternion order in the quaternion algebra, Γ(I) is then the group of norm 1 elements in +. The least absolute value of a trace of a hyperbolic element in Γ( I ) is η 2 + 3 η + 2 {\displaystyle \eta ^{2}+3\eta +2} , corresponding the value 3.936 for the systole of the Klein quartic, one of the highest in this ...
Representing rotations with quaternions, O is made up of the 24 unit Hurwitz quaternions and the 24 Lipschitz quaternions of squared norm 2 normalized by dividing by . As before, this is a 1-to-2 correspondence. O h, (*432) [4,3] 4/m 3 2/m, m 3 m order 48: full octahedral symmetry