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math.MG2006
On some points-and-lines problems and configurations
Noam D. Elkies
We apply an old method for constructing points-and-lines configurations in the plane to study some recent questions in incidence geometry.
math.MG2006★ 25 cited
The D_4 root system is not universally optimal
Henry Cohn, John H. Conway, Noam D. Elkies +1
We prove that the D_4 root system (equivalently, the set of vertices of the regular 24-cell) is not a universally optimal spherical code. We further conjecture that there is no uni…