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Publicado en línea: 13 nov 2012
Páginas: 137 - 138
DOI: https://doi.org/10.2478/v10127-010-0035-4
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The proof of Claim 6.8 in the Appendix of [L. Csirmaz: Secret sharing on infinite graphs, Tatra Mt. Math. Publ. 41 (2008), 1-18] is incorrect. Here we give a new (and hopefully correct) proof.