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Jun
11
comment Extract differential operator from differential form
Do you mean you just want the output to be formatted in TraditionalForm? Then this could be a duplicate of How to make traditional output for derivatives. But I guess you want the factorization with u appearing only once on the right. Is that the main issue? In that case, is it OK to always assume that x is the independent variable?
Jun
11
reviewed Close How to map vertex points from the surface of a straight pipe onto 2D plane
Jun
11
answered How to evaluate Floor[1/2 + Arg[z]/(2π)] with Re[z] > 0
Jun
11
answered Conditionally formatting elements in a list
Jun
10
comment Write an expression as a full derivative
@LoveLearning No, those things in (* ... *) are Mathematica comments that I only included to show what the output of the previous line is.
Jun
9
awarded  Nice Answer
Jun
9
comment ListLinePlot with colors from data
For me this doesn't work (version 8). It's a little more robust if you use a replacement rule to look directly for VertexColors: for example, plot /. HoldPattern[VertexColors -> Automatic] :> colors works for me. But you do lose the anti-aliasing as I mentioned below @Kuba's answer, too.
Jun
9
revised Write an expression as a full derivative
simplified presentation
Jun
9
answered Write an expression as a full derivative
Jun
9
comment ListLinePlot with colors from data
This is how it should work (+1), but there is one pesky issue: as soon as VertexColors appear in the plot (which this approach uses behind the scenes), the output is no longer anti-aliased. This can make the lines appear ugly and jagged if you look closely. This has been addressed in How can I prevent ColorFunction from disabling antialiasing in graphics where I wrap the plot output in a function removeVertexCol to get rid of the VertexColors.
Jun
8
comment Why is Mathematica getting this modular root wrong?
I removed the version-9 tag because for the current version we don't need a special tag. Let me know if you disagree.
Jun
8
revised Why is Mathematica getting this modular root wrong?
version 9 tag not needed.
Jun
8
comment Why is Mathematica getting this modular root wrong?
I have had that crash before, too. It seems that it can be avoided if you copy from Mathematica as plain text (see the Edit menu under Copy as...).
Jun
8
comment Why is Mathematica getting this modular root wrong?
Yes, I think this is a bug in PowerMod, although your second example doesn't give a wrong result for me (version 8.0.4).
Jun
7
reviewed No Action Needed How to do Fast Fourier transform (FFT) for singular functions?
Jun
7
reviewed Close How to test if all the elements in a list are Integers?
Jun
7
answered Create a matrix of matrices using Band and ArrayFlatten
Jun
7
revised Solving for the time-evolution operator in a periodically driven system
Added Floquet matrix
Jun
7
answered Solving for the time-evolution operator in a periodically driven system
Jun
7
comment Solving a complex-valued differential equation with NDSolve
It would be better if you add this to your earlier question here and provide some feedback to my answer there, if it wasn't clear.