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- W4311441333 abstract "In this paper, we introduce ordered blueprints and ordered blue schemes, which serve as a common language for the different approaches to tropicalizations and which enhance tropical varieties with a schematic structure. As an abstract concept, we consider a tropicalization as a moduli problem about extensions of a given valuation <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=v colon k right-arrow upper T> <mml:semantics> <mml:mrow> <mml:mi>v</mml:mi> <mml:mo>:</mml:mo> <mml:mi>k</mml:mi> <mml:mo stretchy=false>→<!-- → --></mml:mo> <mml:mi>T</mml:mi> </mml:mrow> <mml:annotation encoding=application/x-tex>v:kto T</mml:annotation> </mml:semantics> </mml:math> </inline-formula> between ordered blueprints <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=k> <mml:semantics> <mml:mi>k</mml:mi> <mml:annotation encoding=application/x-tex>k</mml:annotation> </mml:semantics> </mml:math> </inline-formula> and <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper T> <mml:semantics> <mml:mi>T</mml:mi> <mml:annotation encoding=application/x-tex>T</mml:annotation> </mml:semantics> </mml:math> </inline-formula>. If <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper T> <mml:semantics> <mml:mi>T</mml:mi> <mml:annotation encoding=application/x-tex>T</mml:annotation> </mml:semantics> </mml:math> </inline-formula> is idempotent, then we show that a generalization of the Giansiracusa bend relation leads to a representing object for the tropicalization, and that it has yet another interpretation in terms of a base change along <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=v> <mml:semantics> <mml:mi>v</mml:mi> <mml:annotation encoding=application/x-tex>v</mml:annotation> </mml:semantics> </mml:math> </inline-formula>. We call such a representing object a <italic>scheme theoretic tropicalization</italic>. This theory recovers and improves other approaches to tropicalizations as we explain with care in the second part of this text. The Berkovich analytification and the Kajiwara-Payne tropicalization appear as rational point sets of a scheme theoretic tropicalization. The same holds true for its generalization by Foster and Ranganathan to higher rank valuations. The scheme theoretic Giansiracusa tropicalization can be recovered from the scheme theoretic tropicalizations in our sense. We obtain an improvement due to the resulting blueprint structure, which is sufficient to remember the Maclagan-Rincón weights. The Macpherson analytification has an interpretation in terms of a scheme theoretic tropicalization, and we give an alternative approach to Macpherson’s construction of tropicalizations. The Thuillier analytification and the Ulirsch tropicalization are rational point sets of a scheme theoretic tropicalization. Our approach yields a generalization to any, possibly non-trivial, valuation <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=v colon k right-arrow upper T> <mml:semantics> <mml:mrow> <mml:mi>v</mml:mi> <mml:mo>:</mml:mo> <mml:mi>k</mml:mi> <mml:mo stretchy=false>→<!-- → --></mml:mo> <mml:mi>T</mml:mi> </mml:mrow> <mml:annotation encoding=application/x-tex>v:kto T</mml:annotation> </mml:semantics> </mml:math> </inline-formula> with idempotent <inline-formula content-type=math/mathml> <mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML alttext=upper T> <mml:semantics> <mml:mi>T</mml:mi> <mml:annotation encoding=application/x-tex>T</mml:annotation> </mml:semantics> </mml:math> </inline-formula> and enhances the tropicalization with a schematic structure." @default.
- W4311441333 created "2022-12-26" @default.
- W4311441333 creator A5042964790 @default.
- W4311441333 date "2023-02-28" @default.
- W4311441333 modified "2023-10-05" @default.
- W4311441333 title "A unifying approach to tropicalization" @default.
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