Fuss–Catalan enumeration and construction of regions for
Fuss–Catalan enumeration and construction of regions for
Place points labeled in increasing order on the real line, and let be the function in the global Schwinger formula for . For a non-crossing -chord , associate the equalities ; if it surrounds , impose the corresponding strict inequality between the two common values. Fuss–Catalan region conjecture. The regions contributing to are in bijection with the possible non-crossing -chord diagrams, and the region associated with each diagram is obtained by these equalities and nesting inequalities. These regions are all the solutions to , and their contributions produce all the trees of . The supplied text gives no evidence that this conjectural classification and enumeration has been resolved.
Sources & referencesView supporting material
Primary source
Freddy Cachazo and Bruno Giménez Umbert, “Connecting Scalar Amplitudes using The Positive Tropical Grassmannian”, arXiv:2205.02722 (2022).
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