The Whitehouse-module restriction conjecture for the LAnKe representations

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For integers nn and kk, let ρn,k\rho_{n,k} be the representations in the LAnKe array, and let Wk+1W_{k+1} denote the Whitehouse module. For each irreducible submodule of Wk+1W_{k+1}, form a Young diagram by adding n−2n-2 rows of length k−1k-1 to its top; let Wn,kW_{n,k} be the resulting representation of Skn−n−k+3S_{kn-n-k+3}. Whitehouse-module restriction conjecture. The representation ρn,k\rho_{n,k} is the restriction of Wn,kW_{n,k} to Skn−n−k+2S_{kn-n-k+2}.

This conjecture generalizes the relationship between the representations in the LAnKe array and the Whitehouse module, extending the preceding Catalan and Whitehouse-module observations. Finding analogs of parts (a) and (b) of the cited theorem remains an open problem.

References

Primary source

Tamar Friedmann, Phil Hanlon, Richard P. Stanley and Michelle L. Wachs, “On a generalization of Lie(k): a CataLAnKe theorem”, arXiv:1710.00376 (2020).

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