MinT - Information on Result #814308

Information on Result #814308

Linear OOA(3¹⁵⁷, 9866, F₃, 2, 25) (dual of [(9866, 2), 19575, 26]-NRT-code), using OOA 2-folding based on linear OA(3¹⁵⁷, 19732, F₃, 25) (dual of [19732, 19575, 26]-code), using

constructionÂ X applied to C([0,12]) âŠ‚ C([0,9]) [i] based on
1. linear OA(3¹⁴⁵, 19684, F₃, 25) (dual of [19684, 19539, 26]-code), using the expurgated narrow-sense BCH-code C(I) with length 19684Â | 3¹⁸âˆ’1, defining interval IÂ =Â [0,12], and minimum distance dÂ â‰¥ |{−12,−11,…,12}|+1Â =Â 26 (BCH-bound) [i]
2. linear OA(3¹⁰⁹, 19684, F₃, 19) (dual of [19684, 19575, 20]-code), using the expurgated narrow-sense BCH-code C(I) with length 19684Â | 3¹⁸âˆ’1, defining interval IÂ =Â [0,9], and minimum distance dÂ â‰¥ |{−9,−8,…,9}|+1Â =Â 20 (BCH-bound) [i]
3. linear OA(3¹², 48, F₃, 5) (dual of [48, 36, 6]-code), using
  - discarding factors / shortening the dual code based on linear OA(3¹², 54, F₃, 5) (dual of [54, 42, 6]-code), using
    - (u,Â uâˆ’v,Â u+v+w)-construction [i] based on
      1. linear OA(3¹, 13, F₃, 1) (dual of [13, 12, 2]-code), using
        discarding factors / shortening the dual code based on linear OA(3¹, s, F₃, 1) (dual of [s, s−1, 2]-code) for arbitrarily large s, using
        parity-check code [i]
      2. linear OA(3³, 13, F₃, 2) (dual of [13, 10, 3]-code), using
        Hamming code H(3,3) [i]
      3. 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
        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]
        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]

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		Method
1	Linear OOA(3¹⁵⁷, 9866, F₃, 2, 24) (dual of [(9866, 2), 19575, 25]-NRT-code)	[i]	Strength Reduction for OOAs
2	Linear OOA(3¹⁵⁹, 9867, F₃, 2, 25) (dual of [(9867, 2), 19575, 26]-NRT-code)	[i]	NRT-Code Embedding in Larger Space
3	Linear OOA(3¹⁵⁸, 9866, F₃, 2, 25) (dual of [(9866, 2), 19574, 26]-NRT-code)	[i]	OOA Duplication
4	Linear OOA(3¹⁵⁷, 9866, F₃, 3, 25) (dual of [(9866, 3), 29441, 26]-NRT-code)	[i]	Embedding of OOA with Gilbertâ€“VarÅ¡amov Bound
5	Linear OOA(3¹⁵⁷, 9866, F₃, 4, 25) (dual of [(9866, 4), 39307, 26]-NRT-code)	[i]
6	Linear OOA(3¹⁵⁷, 9866, F₃, 5, 25) (dual of [(9866, 5), 49173, 26]-NRT-code)	[i]
7	Digital (132, 157, 9866)-net over F₃	[i]