Ngày tải lên :
07/08/2014, 06:22
... (1998), #R22 References [1] C Bachoc and G Nebe, Extremal lattices of minimum related to the Mathieu group M22 , J reine angew Math 494 (1998), 129–140 [2] A E Brouwer, J B Shearer, N J A Sloane and ... dimensions 32, 36, 40, 44, 64, 80 and 128 For other examples see [12], and for further details about the codes see [7], [15] n=32 We take n0 = 32, n1 = 8, n2 = and use A(32, 8) ≥ 217 from [3], ... 217 + 1117 · 27 + 32 · 22 = 276,032 n=36 Let the 36 coordinates be labeled (i, j), ≤ i, j ≤ 5, and let the symmetric group S6 act by (i, j) → (iπ , j σ(π) ), where π ∈ S6 and σ is the outer automorphism...