Bumpless pipe dream transition compatibility
Let be a -row reduced bumpless pipe dream such that row has no blanks (“weighty tiles”). Let be the RC graph corresponding to under the natural bijection between bumpless pipe dreams and RC graphs, let be Weigandt's transition map on bumpless pipe dreams, and let denote the RC-graph transition operation. Bumpless pipe dream transition conjecture. Then
This is the precise compatibility assertion behind the proposed realization of the RC-graph transition algorithm by bumpless pipe dreams. The source describes the transition maps and the Gao–Huang bijection, but gives no resolution of the conjecture.
References
Primary source
Matthew J. Samuel, “A Littlewood-Richardson Rule for Forest Polynomials via the Schubert Bialgebra”, arXiv:2606.23876 (2026).
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