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May
26
answered Listing elements starting from 0
May
23
comment Solution to $y = x^x (1-x)^{(1-x)}$ for $x$
@Guesswhoitis. I agree. This is a math question really, not Mathematica.
May
23
comment Solution to $y = x^x (1-x)^{(1-x)}$ for $x$
@Guesswhoitis. yes, but that is what I mean, now solve for $x$ from the above, and take series expansion of the RHS, then equate the $x$ coeffcients. There will be one term in the series with $x$ in it. That is what I meant.
May
23
comment Solution to $y = x^x (1-x)^{(1-x)}$ for $x$
How taking the logs of both sides, then separate $x$ by itself in terms of all the others terms (which will have $x$ in them), you get $x=\frac{\ln(y)-ln(1-x)}{ln(x)-ln(1-x)}$ and then take series expansion of the RHS in $x$, and then equate the $x$ coefficients, so you get $1=\frac{log(x)-log(y)}{log(x)^2}$ and now solve this for $x$ which gives E^(1/2 (1 - Sqrt[1 - 4 Log[y]])) with complicated conditionals. warning, I am not a math major, since the above might not make sense math wise, but something to look at.
May
22
awarded  equation-solving
May
21
comment NDSolve and assuming
on use of assumptions: DSolve and NDSolve do not use assumptions themselves. I can't find the reference on this now, but this came up before. Here is dsolve-will-not-apply-assumption question on assumptions with DSolve
May
21
revised Does the equation have two roots?
update finding on maple fsolve
May
21
answered Does the equation have two roots?
May
20
comment Roots of Whittaker W function
@Guesswhoitis. I did try it before commenting. They are tiny and they all went away after Chop. V 10.1
May
20
comment Roots of Whittaker W function
One issue is that they all have a nonzero imaginary component To clean, use Chop it is floating point computation noise.
May
20
comment How can I mark a point on a slider control?
@glance the tick is the control variable used to control everything. a control variable has to appear in the Manipulate expression somewhere to be tracked.
May
20
comment Are there any open source projects related to signal processing
You can't buy the DSP app anymore. I have it since I bought it long time ago, but it does not run anymore on new versions of M. Check this site which I think is the origin of that application from long time ago by Brian Evans.
May
20
comment Are there any open source projects related to signal processing
There used to be Mathematica DSP application, but most of that functionality are integrated to Mathematica now (not open source ofcourse ;)
May
20
comment Is there a way to separate variables between multiple notebooks?
@ShutaoTang I do not know. But if you ask at Mathworks Answers forum or at comp.soft-sys.matlab someone there should know.
May
18
comment Discrepancy in the series expansion of $\log(z/(z-1))$ in Mathematica 5
Yes, I think M should have the sign function there. I verified with Maple, Maple gives this: series(log(z/(z - 1)), z=0); ln(z)+I*csgn(I*z)*Pi+z+(1/2)*z^2+(1/3)*z^3+(1/4)*z^4+(1/5)*z^5+.... notice the I*csgn(I*z) there, which is explained more here
May
18
comment ParametricNDSolve without initial condition?
But help shows how to use the result? The examples all show how to use it. Is the question about how to use the result or something else?
May
18
revised Choosing FEM element type and mesh refinement
removed name from update not needed
May
18
revised How to make Mathematica show matrices and vectors nicely
added
May
18
answered How to make Mathematica show matrices and vectors nicely
May
18
comment Choosing FEM element type and mesh refinement
fyi, I copied the code from the notebook. To do this in the future, convert the cells to InputForm and then copy as text and paste here as code.