The Lie algebra E7½ is a subalgebra of E8 containing E7 def…

Twetch · February 20, 2020

The Lie algebra E7½ is a subalgebra of E8 containing E7 defined by Landsberg and Manivel in order to fill the "hole" in a dimension formula for the exceptional series En of simple Lie algebras.

"7½, right?"

<https://youtu.be/T2Y7oo3iB40>