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Results tagged with at.algebraic-topology
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user 111491
Homotopy theory, homological algebra, algebraic treatments of manifolds.
2
votes
What is the fundamental group of $\mathcal O_{\mathbb P^n}(k)$ minus the zero section
Another way to see that the fundamental group is $\mathbb{Z}/k$ is using geometry of cyclic quotient singularities and it goes as follows.
We consider the negative twists first. In this case the tot …
- 2,310
7
votes
Accepted
Torsion in the cohomology of Fano varieties of lines
Here is an expanded version of my comments. Let's work over the complex numbers which I suppose is assumed in the question. Let $K_0(Var)$ be the Grothendieck ring of varieties (see e.g. https://arxiv …
- 2,310
3
votes
Milnor lattice and Du Val singularity
Nikulin, in $\S$2 of his classical paper about lattices explains an algorithm how to compute the Milnor lattice of a function germ with an isolated singularity. Specifically, in Theorem 2.2.2 he says …
- 2,310