Lemma 76.14.3. Let S be a scheme. If f : X \to Y is a formally unramified morphism of algebraic spaces over S, then given any solid commutative diagram
where T \subset T' is a first order thickening of algebraic spaces over S there exists at most one dotted arrow making the diagram commute. In other words, in Definition 76.14.1 the condition that T be an affine scheme may be dropped.
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Comment #8790 by Niven on
Comment #9292 by Stacks project on