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Christian Blatter earned this badge 24 times
apr 26 at 23:45
Is Fourier Series an “Inverse” of Taylor Series
mar 23 at 23:33
How to show $(1/n!)^{1/n}$ goes to $0$ as $n$ goes to infinity?
mar 6 at 12:24
Solving the differential equation $\frac{dy}{dx}=\frac{3x+4y+7}{x-2y-11}$
feb 6 at 22:20
Solving 4 unknown angles in quadrilateral possible?
jan 11 at 0:53
How can I prove Infinitesimal Limit
nov 30 at 8:07
Two squares in a box.
oct 7 at 21:30
What is a hexagon?
sep 4 at 16:43
Olympiad calculus problem
aug 25 at 0:47
Appropriate Notation: $\equiv$ versus $:=$
jun 30 at 19:21
If $f(0)=0$ and $f'$ is increasing, then $\frac{f(x)}{x}$ is increasing.
may 3 '12 at 15:19
Representing the multiplication of two numbers on the real line
may 2 '12 at 19:49
Is 1100 a valid state for this machine?
mar 28 '12 at 22:00
A problem about floor function
dec 20 '11 at 19:40
On a topological proof of the infinitude of prime numbers.
nov 13 '11 at 21:02
Why do 4 circles cover the surface of a sphere?
nov 7 '11 at 23:43
Proof: If $f'=0$ then is $f$ is constant
jul 27 '11 at 3:32
Nice expression for minimum of three variables?
jul 8 '11 at 14:43
Intuitive interpretation of the Laplacian
may 30 '11 at 19:26
A way to see that $\int_{0}^{\infty}\exp(-x)dx=1$?
apr 30 '11 at 22:42
What is the volume of $\{ (x,y,z) \in \mathbb{R}^3_{\geq 0} |\; \sqrt{x} + \sqrt{y} + \sqrt{z} \leq 1 \}$?
mar 22 '11 at 1:31
Nice proofs of $\zeta(4) = \pi^4/90$?
jan 8 '11 at 18:21
Connection between fourier transform and taylor series
jan 8 '11 at 15:16
Is there a rational number (with denominator not greater than 200) between 15/106 and 16/113?
nov 17 '10 at 0:00
What is the importance of the Collatz conjecture?

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