The number theoretic function $s(n) = \frac{1}{2} n$ if $n$ is even, $s(n) = 3n + 1$ if $n$ is odd, generates for each $n$ a Collatz sequence $\{ s^k(n)\}^\infty_{k ...

SINGAPORE - Prime Minister Lee Hsien Loong announced on Friday (Dec 20) that he will be on leave from Dec 21 to Jan 3. During this time off, besides plans to spend time with family and "perhaps go ...