MinT - Information on Result #562782

Information on Result #562782

There is no linear OOA(7³¹, 40, F₇, 2, 27) (dual of [(40, 2), 49, 28]-NRT-code), because 3 step m-reduction would yield linear OA(7²⁸, 40, F₇, 24) (dual of [40, 12, 25]-code), but

constructionÂ Y1 [i] would yield
1. linear OA(7²⁷, 30, F₇, 24) (dual of [30, 3, 25]-code), but
  - â€œHi4â€ bound on codes from Brouwerâ€™s database [i]
2. linear OA(7¹², 40, F₇, 10) (dual of [40, 28, 11]-code), but
  - discarding factors / shortening the dual code would yield linear OA(7¹², 36, F₇, 10) (dual of [36, 24, 11]-code), but
    - constructionÂ Y1 [i] would yield
      1. linear OA(7¹¹, 15, F₇, 10) (dual of [15, 4, 11]-code), but
        â€œBPMâ€ bound on codes from Brouwerâ€™s database [i]
      2. linear OA(7²⁴, 36, F₇, 21) (dual of [36, 12, 22]-code), but
        discarding factors / shortening the dual code would yield linear OA(7²⁴, 31, F₇, 21) (dual of [31, 7, 22]-code), but
        residual code [i] would yield OA(7³, 9, S₇, 3), but
        bound for OAs with index unity [i]

Mode: Bound (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	No linear OOA(7³¹, 40, F₇, 3, 27) (dual of [(40, 3), 89, 28]-NRT-code)	[i]		Depth Reduction