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Qiaochu Yuan earned this badge 347 times |
aug 7 '11 at 2:13
Are the axioms for abelian group theory independent?
aug 5 '11 at 21:47
How does one know that a theorem is strong enough to publish?
aug 1 '11 at 21:15
Why bother with Mathematics, if Gödel's Incompleteness Theorem is true?
jul 29 '11 at 16:01
Purely combinatorial proof that$ (e^x)' = e^x$
jul 28 '11 at 5:39
What's the “limit” in the definition of Riemann integral?
jul 28 '11 at 5:34
Surprising Generalizations
jul 27 '11 at 2:07
Ideas of finding counterexamples?
jul 23 '11 at 7:16
Why is it “easier” to work with function fields than with algebraic number fields?
jul 22 '11 at 3:20
is the group of rational numbers the fundamental group of some space?
jul 21 '11 at 10:54
Why do we take a derivative?
jul 21 '11 at 6:29
Question about a metric on $\mathbb{R}^2$
jul 17 '11 at 16:20
What is the Cardinality of the Nameable Numbers?
jul 17 '11 at 10:44
Computing the odd terms of the Taylor series of $\frac{z}{e^z-1}$
jul 15 '11 at 5:42
Geometry or topology behind the “impossible staircase”
jul 14 '11 at 18:52
Find the average of $\sin^{100} (x)$ in 5 minutes?
jul 14 '11 at 14:22
Are all numbers real numbers?
jul 14 '11 at 4:12
Different methods to compute $\sum\limits_{n=1}^\infty \frac{1}{n^2}$
jul 9 '11 at 23:34
Is the empty graph connected?
jul 7 '11 at 2:49
How can I understand and prove the “sum and difference formulas” in trigonometry? (cos(a ± b) = …, etc.)?
jul 7 '11 at 2:49
Characterising functions $f$ that can be written as $f = g \circ g$?
jul 7 '11 at 2:49
List of Interesting Math Blogs
jul 7 '11 at 2:49
What's so “natural” about the base of natural logarithms?
jul 7 '11 at 2:49
What is the Riemann-Zeta function?
jul 7 '11 at 2:49
Why are differentiable complex functions infinitely differentiable?
jul 5 '11 at 19:02
A better approximation for $2(p+1)x^p - px - 2 = 0$
jul 3 '11 at 0:10
Why is Euler's Gamma function the “best” extension of the factorial function to the reals?
jul 2 '11 at 20:00
Is infinity an odd or even number?
jun 28 '11 at 5:08
Is Cross Product Defined on Vector Space?
jun 22 '11 at 9:08
When do I use “arbitrary” and/or “fixed” in a proof?
jun 17 '11 at 22:03
Invariant under transformation $i\mapsto -i$ implies real?
jun 17 '11 at 19:48
Is it misleading to think of rank-2 tensors as matrices?
jun 14 '11 at 21:47
Why can't you integrate all power functions without a log function?
jun 12 '11 at 15:10
Maps in Opposite Categories
jun 10 '11 at 11:41
Combinatorial proof of a Fibonacci identity: $n F_1 + (n-1)F_2 + \cdots + F_n = F_{n+4} - n - 3.$
jun 8 '11 at 16:35
Is there a nodeless graph?
jun 8 '11 at 14:25
Applications of Gauss sums
jun 8 '11 at 7:24
Motivation for Eisenstein Criterion
jun 6 '11 at 19:23
Generalize continuity from compact subsets to the whole domain space
jun 4 '11 at 3:45
Sorting a deck of cards with Bogosort
jun 3 '11 at 8:15
Infinite processes riddle
jun 2 '11 at 20:29
How to prove $\cos \frac{2\pi }{5}=\frac{-1+\sqrt{5}}{4}$?
may 31 '11 at 6:26
Generalization of Dirichlet's theorem
may 30 '11 at 8:46
Removing countable hyperplanes from a ball in $\mathbb{R}^n$
may 27 '11 at 15:14
Why do books titled “Abstract Algebra” mostly deal with groups/rings/fields?
may 26 '11 at 21:19
Find all subrings Of $\mathbb{Z}^2$
may 25 '11 at 15:23
$\Delta x$ in limit problem?
may 20 '11 at 7:54
Please explain how Conditionally Convergent can be valid?
may 19 '11 at 11:24
The direct sum $\oplus$ versus the cartesian product $\times$
may 18 '11 at 20:23
Meaning of $\lim_{p\to 0^+}$
may 17 '11 at 13:22
A question about $\prod_{x\in \mathbb{R}^{*}}{x}$
may 16 '11 at 22:22
A non-mathematician’s (programmer’s) question on infinity?
may 16 '11 at 7:22
Why should I care about adjoint functors
may 15 '11 at 20:12
How to label a cube
may 15 '11 at 17:42
How come such different methods result in the same number, $e$?
