Broué's regular-element conjecture for splendid Rickard complexes

About 20 years old · traced to

Assume the regular-element setting of the source: L=T=CG(D){\mathbf L}={\mathbf T}=C_{\mathbf G}(D) is a torus, OGb{\mathcal O}Gb is the principal block, ℓ∤(q−1)\ell\nmid(q-1), FF acts trivially on the Weyl group, wdw_d is the specified good regular element of order d>1d>1, and H/CG(D)≃CW(wd)H/C_G(D)\simeq C_W(w_d). Let BdB_d be the braid group of CW(wd)C_W(w_d) and let Y(wd)Y(w_d) be the associated Deligne–Lusztig variety. Broué's regular-element conjecture. There is a complex

C∈Kb((OGb)⊗(OHbD)opp⁡-lperm⁡)C\in K^b(({\mathcal O}Gb)\otimes({\mathcal O}Hb_D)^{\operatorname{opp}}\operatorname{-lperm})

unique up to isomorphism, together with the surjective morphism and the two compatibility properties stated in the source; moreover, such a complex induces a Rickard equivalence between OGb{\mathcal O}Gb and OHbD{\mathcal O}Hb_D. This is a precise splendid refinement of the Deligne–Lusztig form of Broué's conjecture. The source records several special cases but leaves the general assertion open.

References

Primary source

Raphael Rouquier, “Derived equivalences and finite dimensional algebras”, arXiv:math/0603356 (2006).

Progress summary

Never refreshed

Nothing recorded yet. Refresh searches the literature and the public web for attempts on this problem, and writes the first summary here.

Solutions 0

No solutions have been posted yet.