Timeline for Is a finite birational morphism a blowup?
Current License: CC BY-SA 3.0
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| Jan 21, 2017 at 8:22 | comment | added | user19475 | This was meant as an answer to your second question: "If we take the Galois closure $C' \to C \to D$ then $C' \to C$ is a finite birational morphism of projective schemes. Is this morphism a blowup?" | |
| Jan 21, 2017 at 0:56 | comment | added | meh | I would check Hartshorne too. There is some result along the lines of 'any projective morphism is the blow up of some coherent sheaf of ideals'. I don't remember the conditions on the schemes thought. | |
| Jan 20, 2017 at 18:34 | comment | added | Jeremy Berquist | In response to the answer given above, what if the varieties are reducible? | |
| Jan 20, 2017 at 18:28 | history | answered | user19475 | CC BY-SA 3.0 |