444 reputation
212
bio website
location
age
visits member for 2 years, 2 months
seen 7 hours ago

Dec
10
accepted Elliptic curves as cubics as discussed in Ravi Vakil's notes
Dec
9
comment Elliptic curves as cubics as discussed in Ravi Vakil's notes
Jyrki, this was what I was looking for. Eventually while poking around books, I found this in Silverman's book on elliptic curves. Thank you much.
Dec
7
comment Elliptic curves as cubics as discussed in Ravi Vakil's notes
I am pretty confident the answer is no, so excepting that the answer is actually no, what do we need about $\mathbb{P}^n_A$ for this to be true?
Dec
7
comment Elliptic curves as cubics as discussed in Ravi Vakil's notes
Is this true for instance if we replace $k$ by a ring $A$?
Dec
7
asked Elliptic curves as cubics as discussed in Ravi Vakil's notes
Dec
4
comment Classifying line bundles with basechange
Yeah. I figured that, but I was thinking about more general examples, like if the base extension is like some extension of base ring. Something there must be times where you can hope to recover the information
Dec
4
asked Classifying line bundles with basechange
Nov
17
comment Let $f(x)$ and $g(x)$ continuous functions at $x = 0$ such that $f(0) = 0 = g(0)$. Show that limit as $x$ approaches zero of $f(x)^{g(x)} = 1$
It is false. This is the reason why we don't just define 0^0 to be 1. I will try and find the counterexample
Nov
11
asked Direct limits and inverse limits commuting
Oct
22
accepted Confused about short exact sequence involving $\mathcal{O}_{\mathbb{P}^n}$ and $\mathcal{O}_Z$ for $\pi:Z\rightarrow \mathbb{P}^n$ closed embedding
Oct
22
comment Confused about short exact sequence involving $\mathcal{O}_{\mathbb{P}^n}$ and $\mathcal{O}_Z$ for $\pi:Z\rightarrow \mathbb{P}^n$ closed embedding
Too much time has passed for me to edit. I meant chapter II in Hartshorne (not in chapter III)
Oct
22
comment Confused about short exact sequence involving $\mathcal{O}_{\mathbb{P}^n}$ and $\mathcal{O}_Z$ for $\pi:Z\rightarrow \mathbb{P}^n$ closed embedding
My question seems to be answered by Prop 5.12 in Chapter III of Hartshorne
Oct
22
asked Confused about short exact sequence involving $\mathcal{O}_{\mathbb{P}^n}$ and $\mathcal{O}_Z$ for $\pi:Z\rightarrow \mathbb{P}^n$ closed embedding
Oct
18
awarded  Yearling
Oct
12
awarded  Critic
Sep
30
awarded  Explainer
Sep
29
accepted Morphism schemes after base extension
Aug
12
asked Morphism schemes after base extension
Jul
2
awarded  Curious
Jun
4
comment Question on framed bordism classes definition
Adding to my previous comment, does this mean one can compute $\Omega_i^{fr}$ as $\Omega_{i;\mathbb{R}^k}^{fr}$ for $k\gg i$?