bio | website | math.utah.edu/~schwede |
---|---|---|
location | Utah | |
age | 36 | |
visits | member for | 5 years, 6 months |
seen | 42 mins ago | |
stats | profile views | 5,596 |
I'm an associate professor at the University of Utah. I work on algebraic geometry and commutative algebra.
Jul 24 |
reviewed | Close Fiber bundle with no connection for the fibers |
Jul 23 |
reviewed | Leave Open Why should we regard $PL(M)$ as a simplicial group? |
Jul 23 |
reviewed | Leave Open non local indecomposable commutative ring |
Jul 23 |
reviewed | Leave Open The scheme $y^n = x^{2n}$ for $n$ a rational number |
Jul 22 |
comment |
pull back of an ample line bundle under a blow up
Is $Y$ itself also smooth (then the answer is yes, see for instance Hartshorne's section on blowups)? If not, are you defining $E$ to the subscheme defined by $I_Z \cdot O_X$? Or are you defining it to the the divisorial part of the exceptional set (with what scheme structure)? Depending on your answer, the answer is also yes... |
Jul 4 |
reviewed | Leave Open Stability of the Solar System |
Jun 23 |
reviewed | Leave Open How do I evaluate this sum :$\sum_{n=0}^{\infty} \frac{\sin(n!)}{\cos(n!)}$ if it's not open problem? |
Jun 23 |
reviewed | Leave Open Is $\sqrt {2 \sqrt {3 \sqrt {4 \ldots}}}$ a rational number? |
Jun 23 |
reviewed | Leave Open Graduate Schools for Graph Theory |
Jun 23 |
reviewed | No Action Needed What is a cumulant really? |
Jun 22 |
reviewed | Leave Open A homeomorphism between total spaces with same fiber and base spaces not homotopic |
Jun 22 |
comment |
About normalization
I think probably googling it will give you some references. The classic reference is Greco-Traverso. There was a recent survey (from an algebraic perspective) by Marie Vitulli. |
Jun 19 |
comment |
About normalization
There is also the related notion of seminormality. $Y$ (a variety over $\mathbb{C}$) is called seminormal if every map of varieties $X \to Y$ which is finite and bijective is an isomorphism (and hence birational as well). Normal implies seminormal. |
Jun 13 |
reviewed | Leave Open How can I find the maximum value of this function? |
Jun 12 |
reviewed | Leave Open A good place where to learn about derived functors |
Jun 10 |
reviewed | Leave Open Who is currently researching topics concerning applying algebraic topology and/or differential geometry to numerical methods? |
May 26 |
comment |
On the number of irreducible components of an exceptional divisor
My recollection is that even for several lines meeting transversally (pairwise), when you blow them up you can get all sorts of weird components over the center. Have you tried any examples? |
May 26 |
comment |
On the number of irreducible components of an exceptional divisor
Are you always blowing up the set $Z$ with the reduced scheme structure, or are you allowing other scheme structures... If the former I'm not sure there is much that can be said. |
May 25 |
awarded | Revival |
May 21 |
awarded | Nice Answer |