The stratification closure-maps conjecture for quantized coordinate rings

Let AA and HH be as in Theorem \textup{(c)}. For JJJ\subset J' in H-SpecAH\text{-}\operatorname{Spec} A, let ϕJJp\phi^p_{JJ'} and ϕJJs\phi^s_{JJ'} be the maps between closed subsets of the primitive and prime strata, respectively. Stratification closure-maps conjecture. There exist an affine variety VJJV_{JJ'}, a corresponding scheme V~JJ\widetilde V_{JJ'}, and morphisms

PrimJAVJJ,PrimJAVJJ,SpecJAV~JJ,SpecJAV~JJ\operatorname{Prim}_{J'} A \to V_{JJ'},\qquad \operatorname{Prim}_J A \to V_{JJ'},\qquad \operatorname{Spec}_{J'} A \to \widetilde V_{JJ'},\qquad \operatorname{Spec}_J A \to \widetilde V_{JJ'}

with the displayed maps denoted by fJJf_{JJ'}, gJJg_{JJ'}, f~JJ\widetilde f_{JJ'}, and g~JJ\widetilde g_{JJ'}, such that

ϕJJp(Y)=fJJ1(gJJ(Y))\phi^p_{JJ'}(Y)=f_{JJ'}^{-1}\bigl(\overline{g_{JJ'}(Y)}\bigr)

for YCL(PrimJA)Y\in {\rm{CL}}(\operatorname{Prim}_J A), and

ϕJJs(Z)=f~JJ1(g~JJ(Z))\phi^s_{JJ'}(Z)=\widetilde f_{JJ'}^{-1}\bigl(\overline{\widetilde g_{JJ'}(Z)}\bigr)

for ZCL(SpecJA)Z\in {\rm{CL}}(\operatorname{Spec}_J A). The conjecture seeks a classical-geometric description of the relations between strata in the prime and primitive spectra; the immediately preceding discussion notes that simpler descriptions by inverse images or closures of images under morphisms do not always work.

Sources & referencesView supporting material

Primary source

K. R. Goodearl, “Spectra of quantum algebras”, arXiv:2211.14967 (2022).

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