##### Wiktionary

**g2**

n. (context economics politics English) (abbreviation of group of two dot=;) the two leading economies of the world, the United States of America and the People's Republic of China

##### Wikipedia

**G2 (mathematics)**

In mathematics, **G** is the name of three simple Lie groups (a complex form, a compact real form and a split real form), their Lie algebras g, as well as some algebraic groups. They are the smallest of the five exceptional simple Lie groups. G has rank 2 and dimension 14. It has two fundamental representations, with dimension 7 and 14.

The compact form of G 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.

**G2**

**G2**, **G02**, **G.II**, **G II**, or **G-2** may refer to: