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    • CommentRowNumber1.
    • CommentAuthorUrs
    • CommentTimeOct 10th 2011

    added statement of and references for some of the homotopy groups of E 8E_8 to E8

    • CommentRowNumber2.
    • CommentAuthorDavid_Corfield
    • CommentTimeMar 16th 2018

    Curious that the extra information on E8 focuses on its homotopy groups, for E7 it’s its two smallest representations, and for E6 it’s the relationship of a split form with SL(3,𝕆)SL(3, \mathbb{O}).

    Is there no such interesting decomposition of the 248-dim adjoint rep of E 8E_8 as the decomposition of the 56-dim of E 7E_7?

    • CommentRowNumber3.
    • CommentAuthorUrs
    • CommentTimeMar 16th 2018
    • (edited Mar 16th 2018)

    “Focus” is a big word for what is a sporadic jotting down of random facts that I happened to feel like making a stubby note of. Some day somebody should invest some energy into these entries. Until then their choice of information is not taken to be an indication of its relevance.

    • CommentRowNumber4.
    • CommentAuthorUrs
    • CommentTimeMay 8th 2019
    • (edited May 8th 2019)

    started a Properties section “Subgroups” (here), but so far just with a quick pointer to SemiSpin(16)

    diff, v12, current