Francesco Polizzi's user avatar
Francesco Polizzi's user avatar
Francesco Polizzi's user avatar
Francesco Polizzi
  • Member for 13 years, 8 months
  • Last seen this week
5 votes

Are seminormal rings regular in codimension 1?

5 votes

Dual of a smooth hypersurface

5 votes

Salmon's proof that tangents to a cubic from a point on it have the same cross-ratio

5 votes
Accepted

Self intersection and deformations

5 votes
Accepted

Self-intersection of a Cartier divisor

5 votes
Accepted

Do singularities of plane curves deform independently?

5 votes
Accepted

Group actions on affine space which are almost good

5 votes

A surjective morphism of abelian varieties induces an epimorphism on the torsion subgroups

5 votes

Laplace-like / cofactor expansion for Pfaffian

5 votes
Accepted

Families of curves on compact complex surfaces and algebraicity

5 votes
Accepted

Picard number of a general fiber of a fiber contraction

5 votes

Almost All Hyperplanes are Not Tangent

5 votes
Accepted

A pencil with exactly one multiple fibre

5 votes
Accepted

Can two singular points collapse to a new singular point?

5 votes

Pull-back of a reflexive sheaf under a flat morphism

5 votes

Where to publish new mathematical identities?

5 votes

Moishezon manifold with vanishing $b_2$

5 votes
Accepted

Singularities of surfaces fibered in rational curves

5 votes

Varieties with few trisecant lines

5 votes
Accepted

Milnor hypersurface

5 votes
Accepted

Fundamental group of a smoothing of a complex surface

5 votes

Subsets of $\mathbb{N}$ arising as genera of smooth projective curves in a variety

5 votes

Global differential forms on Fano varieties

5 votes

Conclusion of Hurewicz for $H_3$ without vanishing fundamental group?

5 votes

Topological characterization of invertible real matrices

5 votes

Simple vector bundle isomorphic to one of its twistings

5 votes

Reconstruct a matrix from its traces

5 votes

Example of a projective variety over a field of characteristic zero which is uniruled but not ruled

5 votes

Surface of type $(2,2)$ on the Segre cubic scroll $\mathbb{P}^1 \times \mathbb{P}^2 \subset \mathbb{P}^5$

4 votes

How do I show that any finite-dimensional (absolute) CW-complex $X$ is locally contractible?

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