Reputation
Next tag badge:
397/400 score
88/80 answers
Badges
13 175 333
Impact
~2.0m people reached

5h
answered $U(n)^2$ is a proper subgroup of $U(n)$
10h
answered Explicit bijection between $\mathbb{R}$ and $\mathcal{P}(\mathbb{N})$
11h
answered Find all the numbers $a$ such that the number $an(n+2)(n+4)$ is an integer for all $n \in \mathbb{N}$
11h
answered Show that the set of positive elements in $\mathbb{Z}$ can be identified with $\mathbb{I(N)}$
11h
answered Constructible numbers defined over the rationals
14h
answered Using definition of derivative to prove that $\lim_{h \to 0} \dfrac{f(x_0+bh)-f(x_0-ch)}{(b+c)h}=f'(x_0) $
14h
answered How can i find all invertible elements?
14h
answered A set containing more than half elements of a group
15h
answered Prove $a_t \rightarrow x$ using the Betweenness Property
16h
answered How does the speed of convergence of these formulae for calculating PI compare with the best algorithms?
16h
answered Is the set of all $f$ such that $\lim_{x\to1^-}f(x) = 0$ an ideal in the ring of functions from $[0,1]\rightarrow \mathbb{R}$?
16h
answered If $N = {q^k}{n^2}$ is an odd perfect number given in Eulerian form, does $\sigma(n^2)/q$ divide $2n^2 - \sigma(n^2)$?
1d
answered Is there a general formula to solve $a^2+b^2+c^2=d^2+e^2+f^2$?
1d
answered Show if one series converges absolutely then so too does the other.
1d
answered Can a decimal multiplied by another decimal ever equal an integer?
1d
answered Pointwise convergence to zero, with integrals converging to a nonzero value
1d
answered How can we know if the minimal polynomial of a matrix has no multiple products?
1d
answered Heine definition of limit of a function at infinity using sequences
1d
answered What is the dimension of $c_0/M$?
1d
answered How many times will the innermost loop be iterated