1 Apr
2008
1 Apr
'08
4:42 p.m.
JZ said:
In particular, can someone explain to me the meaning of the notation A_1, A_2, D_4, E_8, E_8 + A_1 and so on?
Me: These are root lattices and lattices glued together from root lattices - see Conway and Sloane, Sphere Packing, Lattices and Groups (aka SPLAG)
Also there's a lot of reference there to a WD Smith preprint -- does anyone have a reference to that?
Me: I believe this manuscript was in the end withdrawn Neil