darij grinberg

12,635
Reputation
9178 views
Is this your account?

Registered User 

Name darij grinberg
Member for 3 years
Seen 41 mins ago
Website
Location Karlsruhe (home), Munich (until summer 2011), Cambridge/MA (2011-)
Age 24
I'm just here for asking stupid questions.
94

Questions
votes newest views recent
20
29
votes
4
answers
2k
views

Chain homotopy: Why du+ud and not du+vd?

apr 12 10 at 11:43 darij grinberg 12.6k●1●24●75

8

10

20

7
19
votes
2
answers
1k
views

The logic of convex sets

feb 21 11 at 21:25 Gil Kalai 10.7k●6●80●144

10

2
17
votes
3
answers
1k
views

A binomial sum is divisible by p^2

jan 11 10 at 5:24 Michael Lugo 8,415●2●21●48

5

4

12

1 2 3 4 5 … 10 next

 

143

Answers
votes newest views recent
47
Most harmful heuristic?
35
What are some examples of colorful language in serious mathematics papers?
26
How big can the irreps of a finite group be (over an arbitrary field)?
20
Books you would like to read (if somebody would just write them…)
17
Most memorable titles
16
What are the reasons for considering rings without identity?
16
Examples of statements that provably can’t be proved using a promising looking method
15
An example of a beautiful proof that would be accessible at the high school level? (3)
15
Is the sum of two prime ideals in different polynomial rings, K[X_i] and K[Y_i] a prime ideal in K[X_i Y_i]?
14
rational function identity
14
Applications of connectedness
14
A sum involving sines
13
Algebraic number theory and applications to properties of the natural numbers.
13
A gamma function identity
13
Examples of common false beliefs in mathematics. (2)
13
Nice proofs of the Poincaré–Birkhoff–Witt theorem
13
Relationship between determinants.
12
Geometric meaning of trigonometric relations
12
Zero sum of binomial coefficients
12
Symmetric polynoms are Hopf algebra ? What for one needs co-product ?
12
“Algebraic” topologies like the Zariski topology?
12
Describe a topic in one sentence.
11
Books you would like to see translated into English.
11
a type of numbers resulting from the partitions of an integer
10
Pigeonhole Principle for infinite case
10
What are the worst notations, in your opinion ?
9
problems concerning subspace of M_n(C)
9
Rational congruence of binomial coefficient matrices
9
Basic question about affine group schemes
9
Has anyone found an error in an early version of Neukirch? (2)
1 2 3 4 5 next

 

2009

Votes
1773
236

 

188

Tags
× 40
× 29
× 27
× 23
× 21
× 21
× 17
× 16
× 15
× 14
 × 10
× 9
× 9
× 8
× 8
× 8
× 7
× 7
× 7
× 7
 × 6
× 6
× 6
× 6
× 5
× 5
× 5
× 5
× 5
× 5
 × 5
× 5
× 5
× 5
× 4
× 4
× 4
× 4
× 4
× 3
 × 3
× 3
× 3
× 3
× 3
× 3
× 3
× 3
× 3
× 3

 

100

Badges
● Good Question× 3
● Necromancer× 7
● Popular Question× 14
● Nice Question× 22
● Nice Answer× 25
● Yearling× 3
 ● Enlightened× 4
● Good Answer× 3
● Autobiographer
● Cleanup
● Pundit
● Citizen Patrol
 ● Taxonomist
● Civic Duty
● Disciplined
● Fanatic
● Self-Learner
● Mortarboard
 ● Enthusiast
● Critic
● Organizer
● Commentator
● Teacher
● Scholar
 ● Supporter
● Editor
● Student