MinT - Information on Result #2238066

Information on Result #2238066

Linear OA(4¹²¹, 142, F₄, 69) (dual of [142, 21, 70]-code), using 2 times truncation based on linear OA(4¹²³, 144, F₄, 71) (dual of [144, 21, 72]-code), using

concatenation of two codes [i] based on
1. linear OA(64¹⁷, 24, F₆₄, 17) (dual of [24, 7, 18]-code or 24-arc in PG(16,64)), using
  - discarding factors / shortening the dual code based on linear OA(64¹⁷, 64, F₆₄, 17) (dual of [64, 47, 18]-code or 64-arc in PG(16,64)), using
    - Reedâ€“Solomon code RS(47,64) [i]
2. linear OA(4³, 6, F₄, 3) (dual of [6, 3, 4]-code or 6-arc in PG(2,4) or 6-cap in PG(2,4)), using
  - hyperoval in PG(2,Â 4) [i]
  - the Hexacode [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.

Compare with Markus Grassl’s online database of code parameters.

Other Results with Identical Parameters

None.

Depending Results

The following results depend on this result:

	Result		This result only	Method
1	Linear OOA(4¹²¹, 71, F₄, 2, 69) (dual of [(71, 2), 21, 70]-NRT-code)	[i]		OOA Folding
2	Linear OOA(4¹²¹, 47, F₄, 3, 69) (dual of [(47, 3), 20, 70]-NRT-code)	[i]		OOA Folding