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Mathematician, researching in Algebraic Geometry and related topics.


Aug
25
awarded  Nice Answer
Aug
18
revised Simplicity of a rank 2 vector bundle over a principally polarized abelian surface
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Aug
18
revised Simplicity of a rank 2 vector bundle over a principally polarized abelian surface
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Aug
18
revised Simplicity of a rank 2 vector bundle over a principally polarized abelian surface
added 21 characters in body
Aug
18
revised Simplicity of a rank 2 vector bundle over a principally polarized abelian surface
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Aug
18
asked Simplicity of a rank 2 vector bundle over a principally polarized abelian surface
Aug
18
comment Examples of (non-normal) unibranched rings?
Blow-up is an explicit construction, at least for plane curves :-)
Aug
18
comment Examples of (non-normal) unibranched rings?
I think that a necessary condition is that, when you normalize, there is just one point over the singularity. In other words, normalization induces a bijection between the spectra.
Aug
18
comment Examples of (non-normal) unibranched rings?
What if you take the local ring at a geometrically unibranch plane curve singularity, like the cusp $y^2-x^3=0$? It is not a normal local ring.
Aug
17
revised Residual finiteness: why do we care?
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Aug
14
revised Non-degenerate alternating bilinear form on a finite abelian group
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Aug
10
comment Example of a triangulable topological manifold which does not admit a PL structure
Fixed, thanks :-)
Aug
10
revised Example of a triangulable topological manifold which does not admit a PL structure
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Aug
10
awarded  Guru
Aug
10
revised Example of a triangulable topological manifold which does not admit a PL structure
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Aug
10
revised Example of a triangulable topological manifold which does not admit a PL structure
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Aug
10
revised Example of a triangulable topological manifold which does not admit a PL structure
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Aug
10
answered Example of a triangulable topological manifold which does not admit a PL structure
Aug
4
awarded  Nice Answer
Aug
4
revised Non-homeomorphic spaces such that taking away a point makes them homeomorphic
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