2012-10-08T10:24:35Z2012-10-08T10:24:35Zhttp://cab.unime.it/mus/id/eprint/1044This item is in the repository with the URL: http://cab.unime.it/mus/id/eprint/10442012-10-08T10:24:35ZUn limite superiore per i permanenti di certe (0, 1)-matriciWe give a new proof of Ryser's conjecture asserting that in the class of $t h X t h$ (0, 1)-matrices with row sums and column sums equal to $t$ the permanent function takes its maximum on the direct sum of $t X t$ matrices of l'$s$.
Moreover we give a counterexample to a Brualdi's conjecture.Norma Zagaglia Salvi