alex.jordan

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248 Answers

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5
Can we define what is an algebra and what is another?
5
Find the integer closest to $\ln(2013)$
5
“Fun” question: anyone know why $e$ (Euler's Number) was chosen for wave functions?
5
Iterations of $f(x)=\dfrac{ax+b}{cx+d}$
5
Other ways of solving $\cot^{-1}(x)=\sin^{-1}(x)$
5
Multiplicative group of integers modulo n definition issues
5
Product of Polynomials
5
Proving $\int_{1}^{\infty}\frac{\sin x}{\left(\log x\right)^{\frac{1}{2}}}dx$ converges
5
Jordan decomposition of $A^T$ given that of $A$
5
compute: $\int_{0}^{1}e^x(1-x)^{100}dx$
5
Generalizing the trick for integrating $\int_{-\infty}^\infty e^{-x^2}dx$?
5
Maximizing the sum $\sum\limits_{i=1}^nx_ix_{i+1}$ subject to $\sum\limits_{i=1}^nx_i=0$ and $\sum\limits_{i=1}^nx_i^2=1$
5
a continuous function satisfying $f(f(f(x)))=-x$ other than $f(x)=-x$
4
Could you help me with this improper integral
4
$p$ prime, $1 \le k \le p-2$ there exists $x \in \mathbb{Z} \ : \ x^k \neq 0,1 $ (mod p)
4
Intuitive proofs that $\lim\limits_{n\to\infty}\left(1+\frac xn\right)^n=e^x$
4
Intuitive proofs that $\lim\limits_{n\to\infty}\left(1+\frac xn\right)^n=e^x$
4
Given $a+b+c=0$, simplify the following.
4
How to solve $ 227x \equiv 1 ~ (\text{mod} ~ 2011) $?
4
The following series converges?
4
How does this simplify to $\lg{\sqrt{x}}$?
4
A prime number pattern
4
Doubt on 'Rest Theorem' in Polynomial Division
4
Continuous involutions on $\mathbb R$ with at least two fixed points
4
Easier way to calculate this point besides line intersection?
4
Why is the endomorphism ring of $\mathbb{Z}\times\mathbb{Z}$ noncommutative?
3
Confusion related to derivative of a quadratic equation
3
question about limit and series
3
Showing that if $fg=gf$ and $fh=hf$, then $gh=hg$, where $f$, $g$, and $h$ are affine functions
3
How to find the perimeter of a 30 60 90 Triangle?
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