Algebraic geometry II - schemes and sheaves

This is a document that explains an example of "Proj construction" in algebraic geometry. Blow-ups are a key construction in the theory of algebraic varieties. Please dont dive in the proof in the appendix at first approximation. Please use this document as needed for exercises of this week.

EDIT: I added a proposition which tells and explains how to compute the strict transform of any hypersurface in the affine space along the blow-up at the origin.

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