Gee--Herzig--Savitt's tame weight conjecture

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Let FF, χ\chi, and r‾\overline r be as in the paper, with r‾\overline r automorphic of some weight and level. Let W(r‾)W(\overline r) be its set of modular Serre weights, and let W?(r‾p∣IQp)W^?(\overline r_p|_{I_{\mathbf Q_p}}) be the predicted Serre-weight set. Gee--Herzig--Savitt's conjecture. If r‾∣GFv\overline r|_{G_{F_v}} is tame and sufficiently generic at every v∣pv\mid p, then

W(r‾)=W?(r‾p∣IQp).W(\overline r)=W^?(\overline r_p|_{I_{\mathbf Q_p}}).

The source attributes this conjecture to Gee--Herzig--Savitt and applies its GSp4\mathrm{GSp}_4 analogue under suitable genericity and Taylor--Wiles hypotheses.

References

Primary source

Heejong Lee, “Emerton–Gee stacks, Serre weights, and Breuil–Mézard conjectures for GSp_4”, arXiv:2304.13879 (2026).

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