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About: G2 (mathematics)     Goto   Sponge   NotDistinct   Permalink

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Type: yago:WikicatLieGroupsyago:Abstraction100002137yago:Group100031264yago:WikicatAlgebraicGroups New Facet based on Instances of this Class

In mathematics, G2 is the name of three simple Lie groups (a complex form, a compact real form and a split real form), their Lie algebras as well as some algebraic groups. They are the smallest of the five exceptional simple Lie groups. G2 has rank 2 and dimension 14. It has two fundamental representations, with dimension 7 and 14. The compact form of G2 can be described as the automorphism group of the octonion algebra or, equivalently, as the subgroup of SO(7) that preserves any chosen particular vector in its 8-dimensional real spinor representation (a spin representation).