MinT - Information on Result #735883

Information on Result #735883

Linear OA(256⁶⁸, 66055, F₂₅₆, 25) (dual of [66055, 65987, 26]-code), using (u,Â u+v)-construction based on

linear OA(256¹⁹, 517, F₂₅₆, 12) (dual of [517, 498, 13]-code), using
- (u,Â u+v)-construction [i] based on
  1. linear OA(256⁶, 257, F₂₅₆, 6) (dual of [257, 251, 7]-code or 257-arc in PG(5,256)), using
    - extended Reedâ€“Solomon code RS_e(251,256) [i]
    - algebraic-geometric code AG(F,125P) 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]
    - algebraic-geometric code AG(F, Q+82P) with degQ = 4 and degPÂ =Â 3 [i] based on function field F/F₂₅₆ with g(F) = 0 and N(F) ≥ 257 (see above)
    - algebraic-geometric code AG(F,50P) with degPÂ =Â 5 [i] based on function field F/F₂₅₆ with g(F) = 0 and N(F) ≥ 257 (see above)
  2. linear OA(256¹³, 260, F₂₅₆, 12) (dual of [260, 247, 13]-code), using
    - constructionÂ X applied to AG(F,122P) âŠ‚ AG(F,123P) [i] based on
      1. linear OA(256¹², 257, F₂₅₆, 12) (dual of [257, 245, 13]-code or 257-arc in PG(11,256)), using algebraic-geometric code AG(F,122P) with degPÂ =Â 2 [i] based on function field F/F₂₅₆ with g(F) = 0 and N(F) ≥ 257 (see above)
      2. 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 (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]
linear OA(256⁴⁹, 65538, F₂₅₆, 25) (dual of [65538, 65489, 26]-code), using
- constructionÂ X applied to C_e(24) âŠ‚ C_e(23) [i] based on
  1. linear OA(256⁴⁹, 65536, F₂₅₆, 25) (dual of [65536, 65487, 26]-code), using an extension C_e(24) of the primitive narrow-sense BCH-code C(I) with length 65535Â = 256²âˆ’1, defining interval IÂ =Â [1,24], and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 25 [i]
  2. linear OA(256⁴⁷, 65536, F₂₅₆, 24) (dual of [65536, 65489, 25]-code), using an extension C_e(23) of the primitive narrow-sense BCH-code C(I) with length 65535Â = 256²âˆ’1, defining interval IÂ =Â [1,23], and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 24 [i]
  3. linear OA(256⁰, 2, F₂₅₆, 0) (dual of [2, 2, 1]-code), using
    - discarding factors / shortening the dual code based on linear OA(256⁰, s, F₂₅₆, 0) (dual of [s, s, 1]-code) for arbitrarily large s, using
      - OA with only one run / dual of code without redundancy [i]

Mode: Constructive and linear.

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

The following results depend on this result:

	Result		This result only	Method
1	Linear OOA(256⁶⁸, 13211, F₂₅₆, 5, 25) (dual of [(13211, 5), 65987, 26]-NRT-code)	[i]		OOA Folding