MinT - Information on Result #815859

Information on Result #815859

Linear OOA(3¹⁵⁷, 390, F₃, 2, 37) (dual of [(390, 2), 623, 38]-NRT-code), using OOA 2-folding based on linear OA(3¹⁵⁷, 780, F₃, 37) (dual of [780, 623, 38]-code), using

discarding factors / shortening the dual code based on linear OA(3¹⁵⁷, 781, F₃, 37) (dual of [781, 624, 38]-code), using
- constructionÂ XX applied to C₁Â =Â C([334,365]), C₂Â =Â C([340,370]), C₃Â =Â C₁Â +Â C₂Â =Â C([340,365]), and C_âˆ©Â =Â C₁Â âˆ©Â C₂Â =Â C([334,370]) [i] based on
  1. linear OA(3¹²⁴, 728, F₃, 32) (dual of [728, 604, 33]-code), using the primitive BCH-code C(I) with length 728Â = 3⁶âˆ’1, defining interval IÂ =Â {334,335,…,365}, and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 33 [i]
  2. linear OA(3¹²¹, 728, F₃, 31) (dual of [728, 607, 32]-code), using the primitive BCH-code C(I) with length 728Â = 3⁶âˆ’1, defining interval IÂ =Â {340,341,…,370}, and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 32 [i]
  3. linear OA(3¹⁴², 728, F₃, 37) (dual of [728, 586, 38]-code), using the primitive BCH-code C(I) with length 728Â = 3⁶âˆ’1, defining interval IÂ =Â {334,335,…,370}, and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 38 [i]
  4. linear OA(3¹⁰³, 728, F₃, 26) (dual of [728, 625, 27]-code), using the primitive BCH-code C(I) with length 728Â = 3⁶âˆ’1, defining interval IÂ =Â {340,341,…,365}, and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 27 [i]
  5. linear OA(3⁸, 28, F₃, 5) (dual of [28, 20, 6]-code), using
    - dual code (with bound on d by constructionÂ Y1) [i] based on
      1. linear OA(3²⁰, 28, F₃, 14) (dual of [28, 8, 15]-code), using
        contraction [i] based on linear OA(3⁴⁸, 56, F₃, 29) (dual of [56, 8, 30]-code), using the BCH-code C(I) with length 56Â | 3⁶âˆ’1, defining interval IÂ =Â {0,1,…,28}, and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 30 [i]
      2. nonexistence of linear OA(3¹⁹, 23, F₃, 14) (dual of [23, 4, 15]-code), because
        2 times truncation [i] would yield linear OA(3¹⁷, 21, F₃, 12) (dual of [21, 4, 13]-code), but
        â€œHNâ€ bound on codes from Brouwerâ€™s database [i]
  6. linear OA(3⁷, 25, F₃, 4) (dual of [25, 18, 5]-code), using
    - discarding factors / shortening the dual code based on linear OA(3⁷, 26, F₃, 4) (dual of [26, 19, 5]-code), using
      - the primitive expurgated narrow-sense BCH-code C(I) with length 26Â = 3³âˆ’1, defining interval IÂ =Â [0,2], and designed minimum distance dÂ â‰¥Â |I|+1Â =Â 5 [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

None.