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Bjorn Poonen

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Name Bjorn Poonen
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Seen May 25 2010 at 0:42
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148
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Polynomial representing all nonnegative integers

nov 26 10 at 0:44 George Lowther 9,662●1●25●46

18
47
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1
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3k
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Smooth proper scheme over Z

jan 8 10 at 14:01 Pete L. Clark 40k●4●103●227

17
37
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2
answers
2k
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Collapsible group words

jul 11 11 at 19:18 Sam Nead 5,637●12●27

18

5

7

 

80

Answers
votes newest views recent
56
Experimental Mathematics
51
Polynomial with the primes as coefficients irreducible?
45
How can I define the product of two ideals categorically?
39
Is there an “elementary” proof of the infinitude of completely split primes?
33
Expected determinant of a random NxN matrix.
33
Bringing Number and Graph Theory Together: A Conjecture on Prime Numbers
30
Order of the Tate-Shafarevich group
29
Example of a smooth morphism where you can’t lift a map from a nilpotent thickening? (2)
27
Fields of definition of a variety (2)
25
Intuition for the last step in Serre’s proof of the three-squares theorem
25
Roots of truncations of e^x - 1
24
Integer matrices with no integer eigenvalues
21
Images of action of Galois on the Tate module of Elliptic Curve,
21
Everywhere locally isomorphic abelian varieties
21
Question about polynomials with coefficients in Z
21
Is a ‘generic’ variety nonsingular? Or singular?
21
What’s the probability that k + n^2 is squarefree, for fixed k?
20
Theorems with unexpected conclusions
20
Is there a Whitney theorem type theorem for projective schemes?
20
Size of the smallest group not satisfying an identity.
20
When f(x)-a and f(x)-b yield the same field extension
18
Are most cubic plane curves over the rationals elliptic?
18
Are there any nonlinear solutions to f(x+1) - f(x) = f'(x)?
18
Is there a matrix C so that the trace of C^n is dense in R?
18
When a formal power series is a rational function in disguise
18
A two-variable Fourier series and a strange integral
18
Isomorphism problem for commutative algebras and schemes.
16
Is a universally closed morphism of schemes quasi-compact ?
16
non principally polarized complex abelian varieties
16
What are interesting families of subsets of a given set?
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