ScalingStacks

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Lemma 3.19. The map pโ€‹(๐ŸŽ)anp(\mathbf{0})^{\mathrm{an}} induces a continuous map of topological spacecs

pโ€‹(๐ŸŽ)an:Tโ€‹oโ€‹tโ€‹(Lโˆจ)anโ†’(SpecโกVโˆ™โ€‹(L))an.p(\boldsymbol{0})^{\mathrm{an}}:Tot(L^{\vee})^{\mathrm{an}}\rightarrow(\spec V_{{\scriptscriptstyle\bullet}}(L))^{\mathrm{an}}.

Moreover, it induces a homeomorphism

pโ€‹(๐ŸŽ)an:Tโ€‹oโ€‹tโ€‹(Lโˆจ)anโˆ–๐•†anโ†’(SpecโกVโˆ™โ€‹(L))anโˆ–๐ŸŽan.p(\boldsymbol{0})^{\mathrm{an}}:Tot(L^{\vee})^{\mathrm{an}}\setminus\mathbb{O}^{\mathrm{an}}\rightarrow(\spec V_{{\scriptscriptstyle\bullet}}(L))^{\mathrm{an}}\setminus\boldsymbol{0}^{\mathrm{an}}.
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Proof. By Proposition 2.94, the morphism pโก(๐ŸŽ)p(\boldsymbol{0}) of schemes of finite type over Specโกk\spec k induces a continuous map betweeen the topological space of their analytification:

pโ€‹(๐ŸŽ)an:Tโ€‹oโ€‹tโ€‹(Lโˆจ)anโ†’(SpecโกVโˆ™โ€‹(L))an.p(\boldsymbol{0})^{\mathrm{an}}:Tot(L^{\vee})^{\mathrm{an}}\rightarrow(\spec V_{{\scriptscriptstyle\bullet}}(L))^{\mathrm{an}}.

Since

pโก(๐ŸŽ):Tโ€‹oโ€‹tโ€‹(Lโˆจ)โˆ–๐•†โ†’Specโก(Vโˆ™โ€‹(L))โˆ–๐ŸŽp(\boldsymbol{0}):Tot(L^{\vee})\setminus\mathbb{O}\rightarrow\spec(V_{{\scriptscriptstyle\bullet}}(L))\setminus\boldsymbol{0}

is an isomorphism of schemes of finite type, its analytification induces a homeomorphism by Proposition 2.94

pโ€‹(๐ŸŽ)an:Tโ€‹oโ€‹tโ€‹(Lโˆจ)anโˆ–๐•†anโ†’(SpecโกVโˆ™โ€‹(L))anโˆ–๐ŸŽan.p(\boldsymbol{0})^{\mathrm{an}}:Tot(L^{\vee})^{\mathrm{an}}\setminus\mathbb{O}^{\mathrm{an}}\rightarrow(\spec V_{{\scriptscriptstyle\bullet}}(L))^{\mathrm{an}}\setminus\boldsymbol{0}^{\mathrm{an}}.

โˆŽ

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