MinT - Information on Result #1821155

Information on Result #1821155

OA(128³⁷, 520, S₁₂₈, 20), using discarding parts of the base based on linear OA(256³², 520, F₂₅₆, 20) (dual of [520, 488, 21]-code), using

(u,Â u+v)-construction [i] based on
1. linear OA(256¹¹, 260, F₂₅₆, 10) (dual of [260, 249, 11]-code), using
  - constructionÂ X applied to AG(F,123P) âŠ‚ AG(F,124P) [i] based on
    1. linear OA(256¹⁰, 257, F₂₅₆, 10) (dual of [257, 247, 11]-code or 257-arc in PG(9,256)), using algebraic-geometric code AG(F,123P) with degPÂ =Â 2 [i] based on function field F/F₂₅₆ with g(F) = 0 and N(F) ≥ 257, using the rational function field F₂₅₆(x) [i]
    2. linear OA(256⁸, 257, F₂₅₆, 8) (dual of [257, 249, 9]-code or 257-arc in PG(7,256)), using algebraic-geometric code AG(F,124P) with degPÂ =Â 2 [i] based on function field F/F₂₅₆ with g(F) = 0 and N(F) ≥ 257 (see above)
    3. linear OA(256¹, 3, F₂₅₆, 1) (dual of [3, 2, 2]-code), using
      - discarding factors / shortening the dual code based on linear OA(256¹, s, F₂₅₆, 1) (dual of [s, s−1, 2]-code) for arbitrarily large s, using
        parity-check code [i]
2. linear OA(256²¹, 260, F₂₅₆, 20) (dual of [260, 239, 21]-code), using
  - constructionÂ X applied to AG(F,118P) âŠ‚ AG(F,119P) [i] based on
    1. linear OA(256²⁰, 257, F₂₅₆, 20) (dual of [257, 237, 21]-code or 257-arc in PG(19,256)), using algebraic-geometric code AG(F,118P) with degPÂ =Â 2 [i] based on function field F/F₂₅₆ with g(F) = 0 and N(F) ≥ 257 (see above)
    2. linear OA(256¹⁸, 257, F₂₅₆, 18) (dual of [257, 239, 19]-code or 257-arc in PG(17,256)), using algebraic-geometric code AG(F,119P) with degPÂ =Â 2 [i] based on function field F/F₂₅₆ with g(F) = 0 and N(F) ≥ 257 (see above)
    3. linear OA(256¹, 3, F₂₅₆, 1) (dual of [3, 2, 2]-code) (see above)

Mode: Constructive.

Optimality

Show details for fixed k and m, n and k, k and s, k and t, n and m, m and s, m and t, n and s, n and t.

Other Results with Identical Parameters

None.

Depending Results

None.