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Graduate
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Shiva Kintali
on June 9, 2012 | Updated Dec. 6, 2017
Basics of Pfaffians
Let \(G(V,E)\) be an undirected graph. An orientation of \(G\) is Pfaffian if every even cycle \(C\) such that \(G \setminus V(C)\) has a perfect matching, has an odd number of edges directed in eithe…
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pfaffian
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Graduate
By
Shiva Kintali
on June 7, 2012 | Updated Dec. 6, 2017
Planar Graphs are Pfaffians
Let \(G(V,E)\) be an undirected graph. An orientation of \(G\) is Pfaffian if every even cycle \(C\) such that \(G \setminus V(C)\) has a perfect matching, has an odd number of edges directed in eithe…
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pfaffian
planar graphs
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