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{\bf Richard A. Brualdi and Kathleen Kiernan}
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{\bf Landau's and Rado's Theorems and Partial Tournaments}
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Using Rado's theorem for the existence of an independent transversal
of family of subsets of a set on which a matroid is defined, we give a
proof of Landau's theorem for the existence of a tournament with a
prescribed degree sequence. A similar approach is used to determine
when a partial tournament can be extended to a tournament with a
prescribed degree sequence.



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