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# 37 Actions

 Nov 24 revised Calculating all possible sums of the numbers $2^0, 2^1, \ldots, 2^{(n-1)}$ Add missing value Nov 24 suggested approved edit on Calculating all possible sums of the numbers $2^0, 2^1, \ldots, 2^{(n-1)}$ Nov 23 awarded Excavator Nov 23 revised Calculating all possible sums of the numbers $2^0, 2^1, \ldots, 2^{(n-1)}$ Add formatting for clarity Nov 23 suggested approved edit on Calculating all possible sums of the numbers $2^0, 2^1, \ldots, 2^{(n-1)}$ Aug 15 comment Is there a name for the function $\max(x, 0)$? I suppose that's interesting, but it's not at all what the question is asking. Jul 22 revised How to explain what is wrong in this? I had a typo in part of my original example, and the rest of the example was edited to be consistent with that typo; however, this makes the math wrong. Fixing it. Nov 8 comment What are some examples of notation that really improved mathematics? I enjoy the comment that these "belong in this list"... ∈ Aug 15 comment Should I put number combinations like 1111111 onto my lottery ticket? What the Lord said. Also, he said it "seems" less likely. That means he recognizes that it shouldn't be so, but it seems like it is, and so he wants to understand why that is Jul 10 comment “IFF” (if and only if) vs. “TFAE” (the following are equivalent) Perhaps "exactly equivalent" has some technical meaning that I'm not aware of, but to me it implies "equivalent in every way", which I would deny. They are logically equivalent, but conceptually different. May 14 awarded Commentator May 14 comment How to find the limit of this function @LimitsMate, it's not so much a matter of "throwing away" the constant factor with disregard. This can be done here because clearly $\sqrt{n^4+100}>\sqrt{n^4}$ May 13 awarded Caucus May 9 suggested rejected edit on Summation of logs May 8 comment Summation of logs I'm not talking about computational complexity--you can read about numerical stability here: en.wikipedia.org/wiki/Numerical_stability May 8 comment Summation of logs @Inceptio, what you suggest is a very numerically unstable approach May 8 comment Summation of logs Perhaps instead of calculating $N!$ and then taking the $log$, you could in one step calculate the log-gamma function, i.e., $ln Γ (N+1)$. You didn't mention what language you are coding in; this would be very easy in, say, Mathematica. Mar 20 comment Is value of $\pi = 4$? N.S. isn't talking about numerical analysis; he's referring to en.wikipedia.org/wiki/Mathematical_analysis, which provides the foundations of calculus. Aug 27 revised Functions: Linear Function: $f(x) = 3x + 5.$ formatting Aug 27 suggested approved edit on Functions: Linear Function: $f(x) = 3x + 5.$