| Enlightened | First to answer and accepted with score of 10 or more. This badge can be awarded multiple times. |
Robert Israel earned this badge 27 times |
may 12 at 17:51
Why $\displaystyle f(z)=\frac{az+b}{cz+d}$, $a,b,c,d \in \mathbb C$, is a linear transformation?
jan 29 at 23:20
Is $\frac{1}{\exp(z)} - \frac{1}{\exp(\exp(z))} + \frac{1}{\exp(\exp(\exp(z)))} -\ldots$ entire?
jan 23 at 12:53
The last digit of $2^{2006}$
dec 12 at 4:10
Why is $E(\min(A, B)) < \min(E(A), E(B))$?
oct 31 at 21:39
Ramanujan's approximation to factorial
aug 28 at 23:49
Showing that the image of a function is $\mathbb{C}$ if it satisfies a nice functional equation
aug 8 at 14:16
Are non-circular swords possible?
aug 7 at 0:53
“L'Hôpital's rule” vs. “L'Hospital's rule”?
jun 15 '12 at 20:28
Arithmetic of irrationals and the Vedanta behind it..
jun 7 '12 at 6:35
How can we solve: $\sqrt{x} - \ln(x) -1 = 0$?
may 21 '12 at 14:42
How come the Euclidian distance for n-space involves only squares?
may 13 '12 at 23:57
How many numbers of $8$ digits and $9$ digits are there which are multiples of $11$?
mar 7 '12 at 2:06
Simple but difficult to prove inequality involving integrals
feb 19 '12 at 17:23
Is there an explicit isomorphism between $L^\infty[0,1]$ and $\ell^\infty$?
feb 15 '12 at 3:46
Is there a 'far' irrational number?
feb 3 '12 at 9:43
The roots of Hermite polynomials are all real?
jan 25 '12 at 19:41
Inequality with Complex Numbers
dec 1 '11 at 17:47
Can I ever go wrong if I keep thinking of derivatives as ratios?
oct 30 '11 at 9:37
Probability p+k is a prime
jun 24 '11 at 9:24
Radius of convergence of power series
jun 20 '11 at 20:06
What kind of “symmetry” is the symmetric group about?
apr 21 '11 at 9:58
Behaviour of the series $\exp_p(x)=\sum_{k=0}^{\infty}\frac{x^k}{(k!)^p}$ depending on $p\approx 2$?
apr 13 '11 at 20:42
What's the opposite of a cross product?
