астон вілла олоф мэллбэрг

 80 Why are the last two numbers of this sequence never prime? 60 Is this a new method for finding powers? 53 Any rectangular shape on a calculator numpad when divided by 11 gives an integer. Why? 35 Given $P(x)=x^{4}-4x^{3}+12x^{2}-24x+24,$ prove $P(x)=|P(x)|$ for all real $x$ 32 Solving an equality with 3 equations, and 3 variables

### Reputation (41,016)

 -2 How can I prove the following $\begin{equation*} \lim_{n \rightarrow \infty} \frac{n+1}{2n^2 - 1}=0 \end{equation*}$. +10 Can we make it equal to x? +5 Suppose $M$ is an $m \times n$ matrix such that all rows and columns of $M$ sum to $1$. Show that $m=n$ +10 Biggest Lynch-Bell number

### Questions (41)

 23 Suppose $M$ is an $m \times n$ matrix such that all rows and columns of $M$ sum to $1$. Show that $m=n$ 7 A density proof not via Stone-Weierstrass 7 Convergence of maximum of iid random variables in distribution 7 Understanding a “Trivial” Result In Optimal Control Theory 6 Representation of a group of prime power order

### Tags (356)

 407 real-analysis × 227 176 polynomials × 54 371 elementary-number-theory × 108 174 combinatorics × 81 292 linear-algebra × 166 169 abstract-algebra × 93 281 algebra-precalculus × 77 163 proof-verification × 66 204 calculus × 111 147 limits × 77

### Accounts (3)

 Mathematics 41,016 rep 33878 Cryptography 123 rep 5 Stack Overflow 101 rep 1