Second cohomology group for trivial group action of E8 on E8

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This article gives information about the second cohomology group for trivial group action (i.e., the second cohomology group with trivial action) of the group elementary abelian group:E8 on elementary abelian group:E8. The elements of this classify the group extensions with elementary abelian group:E8 in the center and elementary abelian group:E8 the corresponding quotient group. Specifically, these are precisely the central extensions with the given base group and acting group.
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