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Yuyi Zhang

Apparently, this user prefers to keep an air of mystery about them.

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  • Member for 2 years, 4 months
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  • Last seen 9 hours ago

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7 A map is injective if it is nonzero at the generic point? Apr 15 '19
5 $M$ is flat iff $Tor_1(M,N)=0$? Sep 28 '20
4 If $\alpha,\beta\in C$ are algebraic over $Q$, show that $\alpha+\beta$ is a root of a quadratic polynomial in $Q[x]$ (with conditions). Oct 15 '18
4 Why Hessian is a (0,2) symmetry tensor? Oct 10 '18
4 Bijection on conjugate equivalence induce isomorphism? Oct 8 '19
3 Definition of degree of invertible sheaf? May 10 '19
2 What’s the quotient space of this 2-simplex? Jul 29 '19
2 Question about direct product. Jul 30 '19
2 Example of not smooth morphisim Mar 29 '19
2 How to understand fibres of morphisms of schemes. Mar 31 '19
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