User pi_1

17 votes

3 answers

1k views

Cohomology of ramified double cover of $\mathbb P^n$ (reference)

asked May 30, 2017 at 13:24

12 votes

3 answers

894 views

Difference between rationally connected and $\mathrm{CH}_0\simeq \mathbb Z$

asked Sep 13, 2016 at 13:10

6 votes

2 answers

219 views

Linear systems separating points

asked Jun 13, 2019 at 13:05

6 votes

2 answers

227 views

Two abelian groups, each being direct factor of the other

asked May 16, 2017 at 17:28

5 votes

1 answer

302 views

tangent cone and local picture

asked Jan 30, 2019 at 13:52

5 votes

1 answer

894 views

Two ways to look at a double cover of the projective line

asked Mar 16, 2017 at 10:10

5 votes

0 answers

118 views

Degree of unirational parametrization of hypersurfaces

asked Apr 8, 2017 at 15:34

5 votes

1 answer

203 views

Geometric description of Stein factorization in a special case

asked Jul 28, 2017 at 14:14

4 votes

0 answers

129 views

homologically trivial $1$-cycles and surfaces

asked Mar 12, 2018 at 11:53

4 votes

1 answer

119 views

Decide whether there are "linear" relations between quadrics

asked Apr 28, 2020 at 16:26

4 votes

0 answers

119 views

Map between irreducible representations in basis given by Young tableaux

asked Aug 23, 2021 at 12:14

3 votes

0 answers

108 views

Taking the inverse of the total Chern class of a subvariety

asked Jan 16, 2017 at 17:18

3 votes

0 answers

205 views

Degree of the discriminant curve of conic bundle associated to a cubic threefold

asked Aug 22, 2016 at 15:41

3 votes

1 answer

209 views

Transitivity of "being the zero locus of a section of a vector bundle"

asked May 31, 2016 at 11:44

3 votes

1 answer

576 views

Universal bundle of grassmannian of planes and projective bundle over grassmannian of lines

asked Jul 28, 2016 at 12:39

2 votes

1 answer

467 views

Universal family of grassmannian as projective bundle over $\mathbb P^n$

asked Jun 3, 2016 at 12:57

2 votes

0 answers

94 views

Class of the locus where two sections are proportional

asked Aug 13, 2016 at 17:07

2 votes

1 answer

110 views

Inclusion of incidence correspondences

asked Jun 22, 2016 at 15:09

2 votes

0 answers

106 views

Existence of a universal $0$-cycle

asked Jan 30, 2017 at 15:32

2 votes

0 answers

107 views

Direct factors of Jacobian

asked Jul 7, 2017 at 11:18

2 votes

1 answer

143 views

Ideal of the union of two zero loci

asked Aug 14, 2018 at 0:11

2 votes

0 answers

121 views

Non-complete intersection of low degree

asked Dec 19, 2018 at 2:49

1 vote

0 answers

79 views

Lines meeting a hypersurface with given orders

asked Jul 20, 2017 at 10:05

1 vote

0 answers

125 views

Computing a tangent cone

asked Oct 10, 2020 at 18:32

1 vote

0 answers

126 views

Independence of $\ell$-adic homological equivalence of $\ell$

asked Apr 29, 2017 at 11:42

1 vote

0 answers

169 views

Reference quest: variety of lines and variety of planes

asked Jun 25, 2016 at 14:19

1 vote

1 answer

220 views

Riemann-Roch for reducible surfaces

asked Jul 5, 2016 at 14:38

1 vote

0 answers

155 views

Hessian of an hypersurface

asked Oct 26, 2016 at 15:42

1 vote

0 answers

121 views

Torsion $0$-cycle as difference of two points

asked Nov 8, 2016 at 12:29

1 vote

0 answers

163 views

Reduction of morphism with connected fiber

asked Nov 14, 2016 at 13:41

Stack Exchange Network

52 Questions

Cohomology of ramified double cover of $\mathbb P^n$ (reference)

Difference between rationally connected and $\mathrm{CH}_0\simeq \mathbb Z$

Linear systems separating points

Two abelian groups, each being direct factor of the other

tangent cone and local picture

Two ways to look at a double cover of the projective line

Degree of unirational parametrization of hypersurfaces

Geometric description of Stein factorization in a special case

homologically trivial $1$-cycles and surfaces

Decide whether there are "linear" relations between quadrics

Map between irreducible representations in basis given by Young tableaux

Taking the inverse of the total Chern class of a subvariety

Degree of the discriminant curve of conic bundle associated to a cubic threefold

Transitivity of "being the zero locus of a section of a vector bundle"

Universal bundle of grassmannian of planes and projective bundle over grassmannian of lines

Universal family of grassmannian as projective bundle over $\mathbb P^n$

Class of the locus where two sections are proportional

Inclusion of incidence correspondences

Existence of a universal $0$-cycle

Direct factors of Jacobian

Ideal of the union of two zero loci

Non-complete intersection of low degree

Lines meeting a hypersurface with given orders

Computing a tangent cone

Independence of $\ell$-adic homological equivalence of $\ell$

Reference quest: variety of lines and variety of planes

Riemann-Roch for reducible surfaces

Hessian of an hypersurface

Torsion $0$-cycle as difference of two points

Reduction of morphism with connected fiber