Don Coppersmith, Alan J. Hoffman
Linear Algebra and Its Applications
We discuss three equivalent formulations of a theorem of Seymour on nonnegative sums of circuits of a graph, and present a different (but not shorter) proof of Seymour's resut. © 1986 Springer-Verlag New York Inc.
Don Coppersmith, Alan J. Hoffman
Linear Algebra and Its Applications
Wolfgang W. Bein, Peter Brucker, et al.
Mathematical Programming
Heinz Gröflin, Alan J. Hoffman
Combinatorica
Alan J. Hoffman
Linear Algebra and Its Applications