A remark on isotopies of digraphs and permutation matrices

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A remark on isotopies of digraphs and permutation matrices. (English). Časopis pro pěstování matematiky, vol. 102 (1977), issue 3, pp. 230-233

References:

[1] B. Zelinka: Isotopy of digraphs. Czech. Math. J. 22 (1972), 353 - 360. MR 0306037 | Zbl 0239.05118

[2] B. Zelinka: The group of autotopies of a digraph. Czech. Math. J. 21 (1971), 619-624. MR 0323618 | Zbl 0223.05111

[3] B. Zelinka: Antiisotopy of directed graphs. Sborník věd. prací VŠST Liberec 9 (1970), 15-24.

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