ScalingStacks

Subsubsection [04UV]

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(2.2.3) For every dโ€‹lโ€‹tdlt-model ๐’ณ\mathscr{X} of XX, we can define the dual complex ๐’Ÿโก((๐’ณs)red)\mathcal{D}((\mathscr{X}_{s})_{\mathrm{red}}) for the dโ€‹lโ€‹tdlt-pair (๐’ณ,(๐’ณs)red)(\mathscr{X},(\mathscr{X}_{s})_{\mathrm{red}}) by gluing cells corresponding to irreducible components of intersections of irreducible components of ๐’ณs\mathscr{X}_{s}, as in Definition 8 in [dFKX12]. When kk is not algebraically closed, we note that we only glue cells corresponding to irreducible components (instead of geometrically irreducible components). In other words, ๐’Ÿโก((๐’ณs)red)\mathcal{D}((\mathscr{X}_{s})_{\mathrm{red}}) is the quotient of the Galโก(kยฏ/k)\mathrm{Gal}(\bar{k}/k)-equivariant dual complex constructed in [dFKX12, ยง31].

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