Peter Taylor
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 Sep16 revised Kaprekar's constant-related problem Add graph Sep16 revised Kaprekar's constant-related problem edited body Sep15 revised Find all $n\in\mathbb{Z}^+$ satisfying : $n\mid(2^{\varphi(n)}+3^{\varphi(n)}+\cdots +n^{\varphi(n)}).$ Fix a misplaced } Sep13 revised Prove that every practical number is either a power of two or a power of two times a non-trivial polygonal number Don't need the Stewart/Sierpinski characterisation for these cases - that was a hangover from previous thinking Sep11 revised How find this vmatrix of this $a_{n}=\frac{(2n-1)!!}{(2n)!!}$ Close the loop on the generating functions Sep11 revised How find this vmatrix of this $a_{n}=\frac{(2n-1)!!}{(2n)!!}$ Eliminate a long derivation in favour of a reference which gives a more elegant form; complete the proof of my hypothesised closed form Sep11 revised How find this vmatrix of this $a_{n}=\frac{(2n-1)!!}{(2n)!!}$ Alternative closed forms; thoughts towards an inductive proof Sep11 revised How find this vmatrix of this $a_{n}=\frac{(2n-1)!!}{(2n)!!}$ added 70 characters in body Sep11 revised How find this vmatrix of this $a_{n}=\frac{(2n-1)!!}{(2n)!!}$ added 276 characters in body Sep10 revised In a complete lattice every monotone function has a fixpoint (Knasterâ€“Tarski Theorem) http://meta.math.stackexchange.com/questions/8485/how-civil-should-we-be Aug17 revised How to get count of digits of a number edited tags Aug14 revised proofs for combinatorial identities? Correct index of summation Aug9 revised Streaming algorithm for polynomial fitting data? Inline the key part in case the link dies Jul24 revised X : Y :: P : Q to find Q. whats the name of this method? edited tags Jul23 revised Is it possible to build a circle with quadratic Bézier curves? added 370 characters in body Jul15 revised balls and bins - the probability of reaching the exact expected value Correct use of parameters Jul10 revised Dual space and inner/scalar product space formatting Jul4 revised Intersection of cubic bezier curve and circle deleted 9 characters in body Jul1 revised Circle in a simplex added 20 characters in body Jun17 revised Why does this theorem fail for arbitrarily large n? Extended suggested edit to include the bottom half of the second image