13,162 reputation
22356
bio website math.utah.edu/~schwede
location Utah
age 35
visits member for 4 years, 10 months
seen 2 hours ago

I'm an associate professor at the University of Utah. I work on algebraic geometry and commutative algebra.


2h
reviewed Close Maximum Entropy for Dirichlet with Constrained Expectation
1d
reviewed Leave Open How large can you draw an island on a map?
2d
reviewed No Action Needed Finding an overgroup or a subgroup in PGL
2d
reviewed Close Is elliptic curve point division defined over the field of real numbers?
2d
reviewed Leave Open Rational multiple of a line bundle
2d
comment Rational multiple of a line bundle
I voted to leave this open because while the phrasing is confusing, this is exactly the sort of question a student might ask when they are starting research. In particular, it isn't really a question that would be asked outside of a research environment. I could also imagine some nice answers with nice examples.
2d
comment Rational multiple of a line bundle
Why require that $m_1$ and $m_2$ are relatively prime, let me not limit myself to $-K_X$ also. You can have a Cartier divisor that is torsion in the Picard group but not actually linearly equivalent to zero. Then it is $\mathbb{Q}$-linearly equivalent to zero but not itself linearly equivalent to zero. $$\text{ }$$ Definition: on a normal variety, two $\mathbb{Q}$-divisors $F,G$ are $\mathbb{Q}$-linearly equivalent if $mF \sim mG$ for some integer $m > 0$ so that $mF$ and $mG$ are honest Weil divisors.
Nov
17
reviewed Close algebraic function on supersingular elliptic curve
Nov
17
revised an easy example of valuation ring which is not noetherian?
added 77 characters in body
Nov
17
comment an easy example of valuation ring which is not noetherian?
Hi Neil, you are right of course. I was thinking to localize at the maximal ideal generated by all the monomials. I'll fix this.
Nov
14
reviewed Reject suggested edit on Name for generalization of bivariate weighted-homogeneous polynomials
Nov
14
reviewed Close How to check whether a scheme of finite type over Spec Z is regular or not
Nov
14
reviewed Leave Open Grothendieck -sad news
Nov
13
reviewed Reopen Białynicki-Birula theory for non-complete varieties
Nov
13
reviewed Leave Open Orthogonal polynomial under linear transformation
Nov
11
reviewed Close Bernoulli Numbers and radius of convergence
Nov
11
reviewed Close Calculation of Shannon and Simpson Index as a function of time
Nov
10
reviewed Leave Open The properness of a submersion
Nov
10
reviewed Leave Open Path metrics without geodesics
Nov
10
reviewed Reopen A number theoretic identity