Mathematics – Combinatorics
Scientific paper
2006-07-07
Mathematics
Combinatorics
11 pages
Scientific paper
The toric ideals of $3\times 3$ transportation polytopes $T$ are
quadratically generated. The only exception is the Birkhoff polytope $B_3$.
If $T$ is not a multiple of $B_3$, these ideals even have squarefree
quadratic initial ideals. This class contains all smooth $3 \times 3$
transportation polytopes.
Haase Christian
Paffenholz Andreas
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