Converse-invariant orientations of diameter-4 trees are characterized via a new multilinear polynomial P_D, disproving the Ai-Gutin-Lei-Yeo-Zhou conjecture with explicit non-self-converse examples outside the recursive construction.
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On converse invariant trees of diameter four
Converse-invariant orientations of diameter-4 trees are characterized via a new multilinear polynomial P_D, disproving the Ai-Gutin-Lei-Yeo-Zhou conjecture with explicit non-self-converse examples outside the recursive construction.