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.
Alan J. Hoffman
Linear Algebra and Its Applications
Don Coppersmith, Alan J. Hoffman, et al.
Linear Algebra and Its Applications
Louis J. Billera, Carl W. Lee
European Journal of Combinatorics
Alan J. Hoffman
Aequationes Mathematicae