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  2. Quaternion group - Wikipedia

    en.wikipedia.org/wiki/Quaternion_group

    Another characterization is that a finite p-group in which there is a unique subgroup of order p is either cyclic or a 2-group isomorphic to generalized quaternion group. [13] In particular, for a finite field F with odd characteristic, the 2-Sylow subgroup of SL 2 ( F ) is non-abelian and has only one subgroup of order 2, so this 2-Sylow ...

  3. File:Quaternion group; Cayley table; subgroup of SL(2,C).svg

    en.wikipedia.org/wiki/File:Quaternion_group;...

    Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts

  4. Charts on SO (3) - Wikipedia

    en.wikipedia.org/wiki/Charts_on_SO(3)

    The group Spin(3) is isomorphic to the special unitary group SU(2); it is also diffeomorphic to the unit 3-sphere S 3 and can be understood as the group of unit quaternions (i.e. those with absolute value 1). The connection between quaternions and rotations, commonly exploited in computer graphics, is explained in quaternions and spatial rotations.

  5. Quaternionic structure - Wikipedia

    en.wikipedia.org/wiki/Quaternionic_structure

    In mathematics, a quaternionic structure or Q-structure is an axiomatic system that abstracts the concept of a quaternion algebra over a field.. A quaternionic structure is a triple (G, Q, q) where G is an elementary abelian group of exponent 2 with a distinguished element −1, Q is a pointed set with distinguished element 1, and q is a symmetric surjection G×G → Q satisfying axioms

  6. Hypercomplex number - Wikipedia

    en.wikipedia.org/wiki/Hypercomplex_number

    Putting aside the bases which contain an element e i such that e i 2 = 0 (i.e. directions in the original space over which the quadratic form was degenerate), the remaining Clifford algebras can be identified by the label Cl p,q (), indicating that the algebra is constructed from p simple basis elements with e i 2 = +1, q with e i 2 = −1, and ...

  7. Finite subgroups of SU(2) - Wikipedia

    en.wikipedia.org/wiki/Finite_subgroups_of_SU(2)

    Let Γ be a finite subgroup of SO(3), the three-dimensional rotation group.There is a natural homomorphism f of SU(2) onto SO(3) which has kernel {±I}. [4] This double cover can be realised using the adjoint action of SU(2) on the Lie algebra of traceless 2-by-2 skew-adjoint matrices or using the action by conjugation of unit quaternions.

  8. The 7 Dog Breed Groups, Explained (So You Can Know Your ... - AOL

    www.aol.com/7-dog-breed-groups-explained...

    The World Canine Federation recognizes 350 unique dog breeds. In the U.S. The American Kennel Club now recognizes 209 breeds. That’s…a lot of dogs. To better understand each breed, humans have ...

  9. Versor - Wikipedia

    en.wikipedia.org/wiki/Versor

    In mathematics, a versor is a quaternion of norm one (a unit quaternion).Each versor has the form = ⁡ = ⁡ + ⁡, =, [,], where the r 2 = −1 condition means that r is a unit-length vector quaternion (or that the first component of r is zero, and the last three components of r are a unit vector in 3 dimensions).