The ring-structure reconstruction conjecture for the prismatized sphere

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Let \bbSSyn\bbS^\mathrm{Syn} be the syntomic stack and let \bbMm\ifthenelse\equal\bbS,\bbSSyn\bbM_{\mathrm{m}\ifthenelse{\equal{\bbS}{}}{}{,\bbS}}^\mathrm{Syn} be its associated monoid stack. Let (\bbSSyn)\Spf\bbZp(\bbS^\mathrm{Syn})_{\Spf \bbZ_p} and (\bbMm\ifthenelse\equal\bbS,\bbSSyn)\Spf\bbZp(\bbM_{\mathrm{m}\ifthenelse{\equal{\bbS}{}}{}{,\bbS}}^\mathrm{Syn})_{\Spf \bbZ_p} denote their pullbacks to \Spf\bbZp\Spf \bbZ_p. Ring-structure reconstruction conjecture. The map

\bbZpSyn→(\bbSSyn)\Spf\bbZp\bbZ_p^\mathrm{Syn}\to(\bbS^\mathrm{Syn})_{\Spf\bbZ_p}

identifies the source with the stack of ring structures on (\bbMm\ifthenelse\equal\bbS,\bbSSyn)\Spf\bbZp(\bbM_{\mathrm{m}\ifthenelse{\equal{\bbS}{}}{}{,\bbS}}^\mathrm{Syn})_{\Spf\bbZ_p}. This is expected to follow from the main theorem cited in the source together with the non-functoriality of Raksit's height at least one deformed filtered de Rham complexes for rings.

References

Primary source

Dhilan Lahoti and Deven Manam, “Cohomology theories in the moduli of ring stacks”, arXiv:2510.09582 (2025).

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