# Jesko Hüttenhain

less info
reputation
630
bio website nullteilerfrei.de location Germany age 28 member for 2 years, 10 months seen 14 hours ago profile views 685

I'm a PhD student with research interests in Algebraic Geometry, Algebraic Complexity Theory and Geometric Invariant Theory.

# 626 Actions

 Feb27 awarded Custodian Feb27 reviewed Reviewed How to find perpendicular vector to another vector? Feb27 revised How to find perpendicular vector to another vector? added 26 characters in body Feb27 comment Determining whether $\mathbb{C}[X,Y]/(P)$ is a domain, principal, or factorial from geometry. My goodness, I was very sloppy. Of course we have to take the radical. @ZhenLin: This should be correct now, you agree? Feb27 revised Determining whether $\mathbb{C}[X,Y]/(P)$ is a domain, principal, or factorial from geometry. added 35 characters in body Feb27 awarded Civic Duty Feb27 answered Determining whether $\mathbb{C}[X,Y]/(P)$ is a domain, principal, or factorial from geometry. Feb26 comment Determining whether $\mathbb{C}[X,Y]/(P)$ is a domain, principal, or factorial from geometry. I have added the tag for algebraic geometry because that's basically what you are asking about. Indeed, the geometric properties of (for instance) a curve are closely related to its ring of regular functions, i.e. the ring $\mathbb C[X,Y]/(f)$ where $f$ is the polynomial defining the curve. Feb26 revised Determining whether $\mathbb{C}[X,Y]/(P)$ is a domain, principal, or factorial from geometry. edited tags Feb26 comment Abstract nonsense proof of snake lemma @Zhen Lin: I don't see how that would work. We could apply the lemma, but we would apply it to a totally different diagram. We could not conclude that $(\Psi,\theta)$ is exact. What we really need is the fact that $\Gamma=\mathrm{Ker}(\lambda)$, and I do not see why this holds. Feb26 awarded Nice Question Feb26 comment Abstract nonsense proof of snake lemma @Zhen Lin: There you go! Feb26 comment Abstract nonsense proof of snake lemma @Haskell Curry: Thanks for the tip, but Saunders Mac Lane has never really worked that well for me. If I get no answer to this question I might check it out, but usually I prefer Borceux' writing style. Feb26 revised Abstract nonsense proof of snake lemma added pictures. Feb26 asked Abstract nonsense proof of snake lemma Feb18 comment Formula for evaluation of character on a transposition ooooooohhhhh .... that makes more sense now. xD Feb18 comment Formula for evaluation of character on a transposition Alright then, I shall accept this answer. Thanks a bunch for the research, I am quite happy to know that the Sitzungsberichte can be accessed via arXiv. Feb18 accepted Formula for evaluation of character on a transposition Feb13 answered Computational commutative algebra: term orders Feb13 comment Material in a first course in algebraic geometry? I second the recommendation of Gathmann's script, it can be found here.