En (Lie algebra)
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In mathematics, especially in Lie theory, En is the Kac–Moody algebra whose Dynkin diagram is a bifurcating graph with three branches of length 1, 2 and k, with k = n − 4.
More information Finite, Affine (Extended) ...
Finite | |
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E3=A2A1 | |
E4=A4 | |
E5=D5 | |
E6 | |
E7 | |
E8 | |
Affine (Extended) | |
E9 or E(1) 8 or E+ 8 |
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Hyperbolic (Over-extended) | |
E10 or E(1)^ 8 or E++ 8 |
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Lorentzian (Very-extended) | |
E11 or E+++ 8 |
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Kac–Moody | |
E12 or E++++ 8 |
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... |
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In some older books and papers, E2 and E4 are used as names for G2 and F4.