Geodesic
A Lower Bound for the Permanent on a Special Class of Matrices
Canadian mathematical bulletin, Tome 17 (1974) no. 4, pp. 529-530

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DOI

Let Un(f) denote the class of all n × n (0, 1)-matrices with precisely r-ones, r≥3, in each row and column. Then
DOI : 10.4153/CMB-1974-093-2
Mots-clés : 1530, 1548, (0-1)-matrices, permanent, lower bounds 
Hartfiel, D. J. A Lower Bound for the Permanent on a Special Class of Matrices. Canadian mathematical bulletin, Tome 17 (1974) no. 4, pp. 529-530. doi: 10.4153/CMB-1974-093-2
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     title = {A {Lower} {Bound} for the {Permanent} on a {Special} {Class} of {Matrices}},
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     number = {4},
     doi = {10.4153/CMB-1974-093-2},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-093-2/}
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