Dennis Jaheruddin
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 Feb19 revised What happens when square root is performed in inequalities? It was already implied that this was the positive half of the solution, but now it is mentioned explicitly Feb19 suggested approved edit on What happens when square root is performed in inequalities? Dec10 comment Expectation of constraint random walk When I try X = [-1 -1 -1 +1 +1 +1 +1 +1 -1] your Y indeed matches my V. However when I try X = [+1 +1 +1 -1 -1 -1 -1 -1 +1] I don't see the match. Perhaps I just need to clear my mind a bit. Dec10 comment Expectation of constraint random walk Thanks for your answer, but I don't see why $Y_n$ matches the dynamics of the question. For example: X = [1 1 1 -1 -1 -1 -1 -1 1] then S = [1 2 3 2 1 0 -1 -2 -1] and M = [1 2 3 3 3 3 3 3 3] so Y = [0 0 0 1 2 3 4 5 4] but based on this X the value I am interested in would be: V = [1 2 3 2 1 0 0 0 1] Dec10 comment Expectation of constraint random walk @Did That was my intuition as well, however I could not find a proof or strong reasoning for this. Dec10 asked Expectation of constraint random walk Dec9 awarded Caucus Dec4 comment Is it possible to simulate a floor() function with elementary arithmetic? This is at best a supplement to an existing answer. As such I flagged this. Oct23 awarded Yearling Sep30 awarded Explainer Sep24 awarded Autobiographer Sep19 comment In primary school I was showed this. Why does it work? Why does this fail for 645? (or any A,B,C in general?) Sep16 comment Ambiguity of notation: $\sin(x)^2$ Your first line holds if it is only about a single variable. However, if x is defined as y+z you could see sin(y+z)^2 meaning sin((y+z)^2) Sep12 comment proof by induction - explanation on it The core point here is that you choose your base case in such a way that the base case is case k for some k. (Often k=1 is chosen here) Aug29 revised Define an infinite subset of primes such that the sum of reciprocals converges Without this edit the uniqueness of choices is not guaranteed. (You need to make sure to pick something below 2^n+1) Aug29 suggested approved edit on Define an infinite subset of primes such that the sum of reciprocals converges Aug29 comment Safe with $12 \times 10^6$ combinations? How is it possible? It looks like this safe does not have an 'end of sequence' button. As such a person who wants to try a few codes of length 6, will automatically attempt a number of codes of shorter length. In any case, for reasonable safety I would recommend you to pick a code of at least length 5. Below that a patient person can crack it manually. Aug26 comment Average of percentage of 2 numbers. For completeness, it should still be the weighted mean of the percentages if the prices differ. Just weighted by the sum of prices in each group. Aug25 awarded Disciplined Aug22 comment Should I throw the dice again if I have rolled 4? Nice note on the variability. This especially matters if you play something like 'first to five points wins and a tie counts for half'. Then you could choose to play it safe if you are close to winning the match. -- Sidenote, if only a loss gives your opponent a point as well the last line is not relevant.