Lemma 87.31.3 (0GBT)—The Stacks project

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Table of contents
Part 5: Topics in Geometry
Chapter 87: Formal Algebraic Spaces
Section 87.31: Proper morphisms
Lemma 87.31.3 (cite)

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Lemma 87.31.3. Proper morphisms of formal algebraic spaces are preserved by base change.

Proof. This is an immediate consequence of Lemma 87.31.2 and transitivity of base change. $\square$

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