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Octonionic Planes and Real Forms of $G_2$, $F_4$ and $E_6$

Daniele Corradetti, Marin Drinov Academic Publishing House, Alessio Marrani, David Chester, Raymond Aschheim

Abstract: In this work we present a useful way to introduce the octonionic projective and hyperbolic plane $\mathbb{O}P^{2}$ through the use of Veronese vectors. Then we focus on their relation with the exceptional Jordan algebra $\mathfrak{J}_{3}^{\mathbb{O}}$ and show that the Veronese vectors are the rank-one elements of the algebra. We then study groups of motions over the octonionic plane recovering all real forms of $\text{G}_{2}$, $\text{F}_{4}$ and $\text{E}_{6}$ groups and finally give a classification of all octonionic and split-octonionic planes as symmetric spaces.
Keywords: real forms / plane / algebra / text / octonionic / mathfrak / rank / give / exceptional / G_2
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