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Jonas Meyer earned this badge 76 times |
apr 24 at 21:18
Derivation of the formula for the vertex of a Parabola
apr 2 at 8:49
Can every nonsingular $n\times n$ matrix with real entries be made singular by changing exactly one entry?
feb 17 at 23:22
How can I evaluate $\sum_{n=0}^\infty (n+1)x^n$
feb 16 at 7:55
Why $f$ is an automorphism?
feb 13 at 19:47
Is every open, bounded and simply connected subset of $\mathbb{R}^n$ essentially a ball?
dec 27 at 1:37
For every matrix $A\in M_{2}( \mathbb{C}) $ there's $X\in M_{2}( \mathbb{C})$ such that $X^2=A$?
nov 29 at 20:52
what is the name of this number? is it transcendental?
nov 27 at 1:20
Show that, for $t>0$, $\log t$ is not a polynomial.
jul 27 at 14:20
What happens to the 0 element in a Finite Group?
jul 15 at 23:21
$\ln(x^2)$ vs $2\ln x$
jun 12 '12 at 15:32
“Negative” versus “Minus”
jun 4 '12 at 21:36
A series with infinitely many logarithms
mar 24 '12 at 17:08
How is $\operatorname{GL}(1,\mathbb{C})$ related to $\operatorname{GL}(2,\mathbb{R})$?
mar 19 '12 at 21:56
Can two functions with different codomains be equal?
mar 16 '12 at 22:55
Do discontinuous harmonic functions exist?
feb 13 '12 at 22:19
Matrix of Infinite Dimension
feb 12 '12 at 12:16
Power of a matrix
jan 29 '12 at 14:16
A question on the Stirling approximation, and $\log(n!)$
jan 27 '12 at 17:12
How do I rigorously show $f(z)$ is analytic if and only if $\overline{f(\bar{z})}$ is?
jan 27 '12 at 14:01
How badly can Dini's theorem fail if the p.w. limit isn't continuous?
jan 27 '12 at 11:46
Are there injective groups?
jan 19 '12 at 5:09
Why doesn't induction extend to infinity? (re: Fourier series)
jan 12 '12 at 20:05
Difference between complete and closed set
jan 11 '12 at 6:53
Euler's Approximation of pi.
jan 11 '12 at 4:43
Derivative of a function is odd prove the function is even.
jan 6 '12 at 22:17
Continuous function with local maxima everywhere but no global maxima
dec 22 '11 at 12:59
Does every Abelian group admit a ring structure?
dec 19 '11 at 2:37
How to show every subgroup of a cyclic group is cyclic?
dec 16 '11 at 20:12
Can spectrum “specify” an operator?
dec 12 '11 at 10:44
A function that is $L^p$ for all $p$ but is not $L^\infty$?
dec 10 '11 at 21:28
$n^8 \lt 8^n-1$
nov 24 '11 at 3:38
Is every Lebesgue measurable function on $\mathbb{R}$ the pointwise limit of continuous functions?
nov 22 '11 at 12:57
Which step in this process allows me to erroneously conclude that $i = 1$
nov 5 '11 at 21:22
Continuous $f: \mathbb R \to \mathbb R$ with infinitely many zeroes in every interval
oct 30 '11 at 12:08
Measure of the Cantor set plus the Cantor set
oct 20 '11 at 18:57
Topological vs. Algebraic $K$-Theory
sep 12 '11 at 0:49
Why is closure omitted in some group definitions?
sep 1 '11 at 11:10
Showing that $\int\limits_{-a}^a \frac{f(x)}{1+e^{x}} \mathrm dx = \int\limits_0^a f(x) \mathrm dx$, when $f$ is even
aug 30 '11 at 18:09
How can I prove that this function is continuous at $0$?
aug 15 '11 at 8:39
The identity cannot be a commutator in a Banach algebra?
aug 9 '11 at 13:46
integral from 0 to $2\pi$ of $|\cos x|\operatorname{d}x$ not integrating as I'd expect
aug 4 '11 at 23:16
A criterion for series convergence?
aug 4 '11 at 19:00
No continuous function switches $\mathbb{Q}$ and the irrationals
jul 19 '11 at 6:02
More Properties of Entire Functions
jul 18 '11 at 16:46
Fencing perimeters: why is the intuition wrong?
jun 5 '11 at 6:11
the approximation of $\log(266)$?
may 22 '11 at 5:50
Simple proof that $8\left(\frac{9}{10}\right)^8 > 1$
may 20 '11 at 19:10
Isolated zeros on closure of a domain
may 6 '11 at 5:02
Is the void set (∅) a proper subset of every set?
apr 15 '11 at 6:32
Controlling the Size of an Open Cover of a Set of Measure Zero
mar 29 '11 at 21:31
entire 1-1 function
mar 23 '11 at 1:38
Finding the limit of $\frac {n}{\sqrt[n]{n!}}$
feb 23 '11 at 5:06
Which is bigger?
