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 Yearling
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  • 0 posts edited
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  • 27 votes cast
Feb
24
accepted How trustworthy is NMaximize?
Feb
22
awarded  Yearling
Feb
22
revised How trustworthy is NMaximize?
added 337 characters in body
Feb
22
asked How trustworthy is NMaximize?
Nov
2
accepted How to draw this kind of plot?
Nov
2
comment How to draw this kind of plot?
Thank you! That's exactly what I needed.
Nov
2
accepted Why does Mathematica not seem to know that $i^x$ cannot be equal to $0$?
Nov
2
asked How to draw this kind of plot?
Oct
31
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.
Oct
31
awarded  Commentator
Oct
31
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 $0$.
Oct
31
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.
Oct
30
asked Why does Mathematica not seem to know that $i^x$ cannot be equal to $0$?
Jun
23
comment Finite precision - how to get rid of “near zeros”
Chop is just what I was looking for. Thank you!
Jun
23
comment Finite precision - how to get rid of “near zeros”
@Kuba: Precisely what I needed! Thanks.
Jun
23
asked Finite precision - how to get rid of “near zeros”
Jun
23
accepted Set theoretic operations on sets of real numbers
May
29
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.
May
29
asked Set theoretic operations on sets of real numbers
May
7
accepted Why is arithmetic faster for inexact arithmetic?