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12m
answered how can I get the function of a plotted trajectory?
2h
answered Poincaré Section
3h
comment Poincaré Section
What version of Mathematica?
10h
awarded  Revival
18h
answered PiecewiseExpand doesn't take all kind of assumptions
18h
answered Problem with NDSolve
20h
revised Numerical evaluation of ChebyshevT
Improved formatting
20h
comment Integral converging in M9 but not in M10
@Dr.WolfgangHintze See meta.mathematica.stackexchange.com/questions/1043/…
1d
comment Find Root Iteration
@user13223423 If you can say what to change x0 to each time, I can write code to do that. I don't have time to solve the problem of how to determine the starting point, and one might need to know all the details of the problem to do that. You seem to know something about how it moves. Can you not use that to get somewhat close? Or can you always find two numbers, x1, x2 that bracket the root (for which the polynomial is pos. and neg.). If so, look at the FindRoot help. E.g. FindRoot[f, {x, x0, x1, x2}].
1d
comment Find Root Iteration
@user13223423 You provided no code for $x_0$. I have no idea what you want to do with it. The way you use it, it is just a starting point for FindRoot. You'll have to figure out how to get a close enough starting point to the root you seek. By the way, you should write it in Mathematica as x0. The expression x_0 is a Pattern, not a number.
1d
comment Find Root Iteration
OK. I've posted code that "works", but left the f[[0]] issue in. I hope it helps.
1d
answered Find Root Iteration
1d
comment Integral converging in M9 but not in M10
I do not get the error message in V10 on your notebook. (Mac OSX, V10 last beta.)
1d
revised How to understand the usage of Inner and Outer figuratively?
Trying a different presentation
1d
comment How to understand the usage of Inner and Outer figuratively?
Thanks. I wanted a divider, but I hate dealing with tables/grids in Mma. I'd thought about f[a, x], too (i.e., no Format-ting). I was trying to emphasize the columns.
1d
answered How to understand the usage of Inner and Outer figuratively?
1d
comment Example of Integrate applying a numerical evaluation N
+1. There's also NHoldAll. It nice to be reminded that while we might think of a[1] as an indexed parameter, M treats it just like function.
1d
comment Issue in ParallelTable after evaluating another function using NDSolve and FindRoot. What is wrong with this inverse?
@Santi You're welcome. I suppose "bug" is misleading. Something like "problem" or "issue" might seem more appropriate.
1d
revised Integral converging in M9 but not in M10
added 19 characters in body
1d
revised Solving $L=\frac{3}{2} \sqrt{4 \pi ^2 A^2+W^2}-\frac{\sqrt{5 W \sqrt{4 \pi ^2 A^2+W^2}+6 \pi ^2 A^2+3 W^2}}{\sqrt{2}}+\frac{3 W}{2}$ for $W$
Added code to post