Feanor
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 Feb24 accepted How trustworthy is NMaximize? Feb22 awarded Yearling Feb22 revised How trustworthy is NMaximize? added 337 characters in body Feb22 asked How trustworthy is NMaximize? Nov2 accepted How to draw this kind of plot? Nov2 comment How to draw this kind of plot? Thank you! That's exactly what I needed. Nov2 accepted Why does Mathematica not seem to know that $i^x$ cannot be equal to $0$? Nov2 asked How to draw this kind of plot? Oct31 comment Why does Mathematica not seem to know that $i^x$ cannot be equal to $0$? @Nasser: I'm using V 8.0. I didn't realise this would differ between versions. Oct31 awarded Commentator Oct31 comment Why does Mathematica not seem to know that $i^x$ cannot be equal to $0$? Well, I think in your example the two problems are mathematically different. As $x$ goes to $-\infty$, $i^x$ certainly takes the values $1$ and $-1$ infinitely often (for $x$ congruent to $4$ and $2$ modulo $4$, respectively). After replacing $I$ by $2I$ in your example, the limit comes out as $0$. Oct31 comment Why does Mathematica not seem to know that $i^x$ cannot be equal to $0$? Thanks! It works as I was hoping it would. Oct30 asked Why does Mathematica not seem to know that $i^x$ cannot be equal to $0$? Jun23 comment Finite precision - how to get rid of “near zeros” Chop is just what I was looking for. Thank you! Jun23 comment Finite precision - how to get rid of “near zeros” @Kuba: Precisely what I needed! Thanks. Jun23 asked Finite precision - how to get rid of “near zeros” Jun23 accepted Set theoretic operations on sets of real numbers May29 comment Set theoretic operations on sets of real numbers @J.M. I did not, thank you for pointing this out. I will try this and report if it worked. May29 asked Set theoretic operations on sets of real numbers May7 accepted Why is arithmetic faster for inexact arithmetic?