static public void WriteIsDeregement(int[] permutation) { int[][] cyclePermutation = WithoutRepetition.PermutationToCycle(permutation); using (StreamWriter writer = new StreamWriter("log.txt", true)) { WriteDate(writer); WriteLine(writer, "If permutation is a deregement:"); WriteLine(writer); Write(writer, "One-line notation: "); WriteVector(writer, permutation); WriteLine(writer); Write(writer, "Canonical cycle notation: "); WriteCycle(writer, cyclePermutation); WriteLine(writer); WriteLine(writer); Write(writer, "Is a deregement? - "); if (WithoutRepetition.IsDeregement(permutation)) { Write(writer, "yes"); } else { Write(writer, "no"); } WriteLine(writer); } }