David Hansen

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Name	David Hansen
Member for	3 years
Seen	16 hours ago
Website	www2.bc.edu/~hansendd
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Age	25

I like algebra and number theory. I'll be a postdoc at Jussieu starting in September.

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80

147

votes

8

answers

9k

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Polynomial representing all nonnegative integers

nt.number-theory open-problem

nov 26 10 at 0:44 George Lowther 9,448●1●24●44

31

53

votes

6

answers

4k

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Theoretical physics: Why not just R^4?

mp.mathematical-physics reference-request differential-topology four-manifolds

mar 22 11 at 6:50 Kelly Davis 1,093●1●7●16

24

50

votes

7

answers

3k

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Open project: Let’s compute the Fourier expansion of a non-solvable algebraic Maass form.

nt.number-theory computational-number-theo langlands-conjectures

jun 14 at 6:00 Chandan Singh Dalawat 11.5k●1●39●73

17

50

votes

1

answer

3k

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Is there a “classical” proof of this $j$-value congruence?

ag.algebraic-geometry nt.number-theory complex-analysis elliptic-curves

mar 3 12 at 0:46 Tommaso Centeleghe 1,874●4●12

26

43

votes

2

answers

3k

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Non-abelian class field theory and fundamental groups

nt.number-theory langlands-conjectures

nov 30 11 at 5:58 Emerton 38.9k●4●120●198

14

40

votes

1

answer

2k

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Can a positive binary quadratic form represent 14 consecutive numbers?

quadratic-forms nt.number-theory

jul 31 10 at 0:07 Lavender Honey 6,024●30●69

14

34

votes

6

answers

3k

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What are the local Langlands conjectures nowadays, for connected reductive groups over a $p$-adic field?

langlands-conjectures nt.number-theory galois-representations automorphic-forms

may 11 10 at 17:57 Jeffrey Adams 531●4●7

8

26

votes

2

answers

2k

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Does anyone want a pretty Maass form?

soft-question modular-forms journals algorithms

may 30 at 20:41 Kevin Buzzard 22.8k●2●69●136

27

26

votes

5

answers

3k

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Simple examples for the use of spectral sequences

spectral-sequences

jan 29 12 at 19:29 Lalit Jain 255●6

15

25

votes

12

answers

2k

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What Are Some Naturally-Occurring High-Degree Polynomials?

polynomials sequences

may 10 at 0:53 Vladimir Reshetnikov 1,430●9●18

22

24

votes

13

answers

3k

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Shortest/Most elegant proof for $L(1,\chi)\neq 0$

l-functions analytic-number-theory class-field-theory

jan 18 at 0:22 KConrad 17k●3●61●117

9

23

votes

4

answers

1k

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Do Abel summation and zeta summation always coincide?

divergent-series ca.analysis-and-odes

apr 30 10 at 19:55 Brad Rodgers 970●6●13

7

22

votes

4

answers

2k

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difference between equivalence relations on algebraic cycles

ag.algebraic-geometry motives algebraic-cycles

feb 17 10 at 19:46 norondion 4,230●6●34

9

22

votes

7

answers

3k

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Is there a generalisation of the “sunflower spiral” to higher dimensions?

geometry spherical-geometry

feb 26 12 at 2:21 flaviusfrantz 11●2

8

21

votes

2

answers

2k

views

The diophantine eq. $x^4 +y^4 +1=z^2$

diophantine-equations nt.number-theory

jan 16 12 at 9:43 joro 4,260●1●10●31