MinT - Information on Result #561896

Information on Result #561896

There is no linear OOA(4²⁵², 157, F₄, 2, 215) (dual of [(157, 2), 62, 216]-NRT-code), because 103 step m-reduction would yield linear OA(4¹⁴⁹, 157, F₄, 112) (dual of [157, 8, 113]-code), but

constructionÂ Y1 [i] would yield
1. linear OA(4¹⁴⁸, 153, F₄, 112) (dual of [153, 5, 113]-code), but
  - residual code [i] would yield linear OA(4³⁶, 40, F₄, 28) (dual of [40, 4, 29]-code), but
    - residual code [i] would yield linear OA(4⁸, 11, F₄, 7) (dual of [11, 3, 8]-code), but
      - improvement by Maruta on the Griesmer bound [i]
2. OA(4⁸, 157, S₄, 4), but
  - discarding factors would yield OA(4⁸, 121, S₄, 4), but
    - the Rao or (dual) Hamming bound shows that MÂ â‰¥ 65704 > 4⁸ [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(4²⁵², 157, F₄, 3, 215) (dual of [(157, 3), 219, 216]-NRT-code)	[i]		Depth Reduction