Hailong Dao

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Name Hailong Dao
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I enjoy thinking about questions in commutative algebra which have connections to neighboring fields.
45

Questions
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How to find ICM talks?

apr 14 at 10:21 Tittu 1

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23
votes
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answers
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How to draw knots with Latex?

apr 22 at 19:47 François G. Dorais♦ 22.7k●2●49●114

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22
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1
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729
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Good user manuals for technical topics?

apr 25 10 at 19:46 mathphysicist 3,506●14●29

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5
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When can we cancel vector bundles from tensor products?

apr 14 10 at 17:05 damiano 3,887●8●17

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183

Answers
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37
What is the insight of Quillen’s proof that all projective modules over a polynomial ring are free?
32
Plagiarism in the community
31
Do all exact 1 -> A -> AxB -> B -> 1 split for finite groups?
25
Regular, Gorenstein and Cohen-Macaulay
25
Polynomials with rational coefficients
24
Serre’s FAC in English
21
How Much Work Does it Take to be a Successful Mathematician?
19
Reference book for commutative algebra
19
When is the product of two ideals equal to their intersection?
18
Space Curves as Determinantal Varieties
17
Local complete intersections which are not complete intersections
17
Two questions about Cohen-Macaulay rings
14
Checking whether a variety is normal
14
Serre’s theorem about regularity and homological dimension
13
Maximal Ideals in Formal Laurent Series Rings?
13
How to know if somebody else is also working on your problem?
13
The finite subgroups of SL(2,C)
12
Gaining intuition for how submodules behave
12
Why do modules with small support have high Exts?
12
Seeking Noetherian normal domain with vanishing Picard group but not a UFD
12
Can a module be an extension in two really different ways?
12
joint papers/collaboration, take two.
11
Differential graded structures on free resolution?
11
Length of I/I^2 versus Ann(I)/Ann(I)^2 in Artinian rings. (2)
11
irreducibility of generic linear combination of polynomials?
10
Unique factorisation and the fact that $\mathbb A^2-0$ is not an affine variety?
10
How to introduce notions of flat, projective and free modules?
10
Minimal number of generators of a homogeneous ideal (exercise in Harsthorne)
10
A local ring not a quotient of a regular local ring
9
Definition of Chow groups over Spec Z
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