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oleout
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5 votes
1 answer
353 views

The direct limit of roots of unity

4 votes
1 answer
385 views

Genus zero affine curves

4 votes
1 answer
133 views

Galois group $G$ where every element fixes a root is trivial

3 votes
1 answer
127 views

Differential of a function in the inner product does not have an adjoint

3 votes
1 answer
78 views

Question about quadratic field extension of $\mathbb{Q}$

3 votes
0 answers
94 views

Isomorphism of Brauer groups

3 votes
1 answer
256 views

Singular curves and normalization

3 votes
4 answers
105 views

Arguing that $\mathrm{GL}_2(\mathbb{C})$ cannot contain a copy of the Heisenberg group

2 votes
1 answer
213 views

Isomorphism between curves

2 votes
1 answer
84 views

The linear system $|E+nF|$

2 votes
1 answer
73 views

Geometric genus of a surface

2 votes
1 answer
234 views

Points of degree $n$ on an elliptic curve

2 votes
0 answers
92 views

Anticanonical embedding of the degree $9$ del Pezzo surface

2 votes
1 answer
91 views

Interpretation of finite abelian group schemes

2 votes
1 answer
258 views

Homogenizing a smooth affine curve

2 votes
1 answer
212 views

The smooth compactification of a curve

2 votes
1 answer
173 views

Can the Selmer curve be viewed as an elliptic curve?

2 votes
1 answer
74 views

A positive constant bounding all $L^p$-norm of a function for $p>1$

2 votes
1 answer
97 views

Invertible functions on a proper variety

2 votes
1 answer
120 views

Integral $\lim _{n \rightarrow \infty} n \int ^{\frac{2}{n}} _0 f(x+\frac{1}{n})\sin (nx) dx.$

2 votes
1 answer
439 views

Genus one affine curves

2 votes
0 answers
61 views

Interpreting some cohomology groups

2 votes
1 answer
223 views

An exact sequence of complexes

2 votes
1 answer
305 views

Every non-measurable $X \subseteq \mathbb{R}^n$ has non-measurable $Y \subseteq X$ such that $|Z|=0$ for every measurable $Z \subseteq Y$

2 votes
1 answer
177 views

A direct consequence of Lusin's theorem?

2 votes
0 answers
47 views

Local invariant map in the case of closed points of a curve

2 votes
1 answer
79 views

Is the base change of a smooth curve the same as defining it over a field extension?

1 vote
1 answer
53 views

Are these absolute Galois groups isomorphic?

1 vote
0 answers
45 views

How to see that this is a filtration of a vector space?

1 vote
1 answer
48 views

Hyperplanes and linear forms