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Locally Finitely Presented Morphism


A locally finitely presented morphism, also called a morphism locally of finite presentation, is a morphism f:X->S of schemes such that every point of X has an affine scheme neighborhood Spec(A) mapping into an affine scheme neighborhood Spec(R) of its image, where A is isomorphic to R[x_1,...,x_n]/(f_1,...,f_m) for finite m and n.

This property is preserved by composition and base change. Every smooth morphism is locally finitely presented.


See also

Affine Scheme, Base Change, Morphism, Scheme, Smooth Morphism

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References

Grothendieck, A. and Dieudonné, J. "Éléments de géométrie algébrique. IV. Étude locale des schémas et des morphismes de schémas, première partie." Publ. Math. IHES 20, 5-259, 1964. https://doi.org/10.1007/BF02684747.The Stacks Project Authors. "Morphisms of Finite Presentation." §29.22 in The Stacks Project, Tag 01TO, 2026. https://stacks.math.columbia.edu/tag/01TO.

Cite this as:

Weisstein, Eric W. "Locally Finitely Presented Morphism." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/LocallyFinitelyPresentedMorphism.html

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