A parameterized family of alpha-orderings unifies pendent-pair and flat-pair results for symmetric submodular minimization and supports an O(n^3) oracle-based contraction algorithm.
On minimizing symmetric set functions.Combinatorica, 20(3):445–450
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A Unified Approach to Minimizing Symmetric Submodular Functions
A parameterized family of alpha-orderings unifies pendent-pair and flat-pair results for symmetric submodular minimization and supports an O(n^3) oracle-based contraction algorithm.