10,031 research outputs found

    Even Orientations and Pfaffian graphs

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    We give a characterization of Pfaffian graphs in terms of even orientations, extending the characterization of near bipartite non--pfaffian graphs by Fischer and Little \cite{FL}. Our graph theoretical characterization is equivalent to the one proved by Little in \cite{L73} (cf. \cite{LR}) using linear algebra arguments

    A Practical Guide to Competency Assessment

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    Christmas Morning

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    Excellence -- The Goal of the Texas Council

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    Book Review

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    Reviewing Arthur Nussbaum, A History of the Dollar, Columbia University Press, 195
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