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Jun
10
comment Numerical solutions of Gross-Pitaevskii equation
If you have a question on how to select a proper initial and boundary conditions, then it's better be asked on Physics(physics.stackexchange.com).
Jun
6
comment SameQ for unsorted lists
You can try to use Complement, but I'm not sure if it would be faster (and check if it's empty).
Jun
6
comment SameQ for unsorted lists
I don't think there is a faster way (in terms of $O$). You can have some heuristics, but otherwise you won't have faster code than $O(n \log n)$.
May
24
comment nonlinear differential equation
Can you show the output? It produces a straight zero line for me.
May
23
comment How can I plot the complex formula as follow?
@Erergo it's not good for someone to retype that kind of equation. Copy a text. Also, from what I've see, you have a miniscule i, and in Mathematica imaginary unit is a capital I.
May
23
comment How can I plot the complex formula as follow?
possible duplicate of Plotting Complex Quantity Functions
May
23
comment How can I plot the complex formula as follow?
Is it supposed that people willing to help will rewrite the formula from an image?
May
6
comment simple dynamical system with disturbance
@Sam I have extended with plots of displacement for over-, under- and critical dumping.
Apr
25
comment How to invert the default order of polynomial?
So, can you share more about the use case.
Apr
25
comment How to invert the default order of polynomial?
You could use TraditionalForm for this.
Apr
22
comment Something like MATLAB Cody for Mathematica? (Learning through exercises.)
@Phab Actually, it's like ProjectEuler, but only Mathematica allowed and checked.
Apr
21
comment Integrate using \[Esc] int \[Esc]
You should use \[Ctrl] + % for upper bound, it works for me (M10.1, Windows 8.1). \[Ctrl] + ^ is a superscript, it's an index.
Apr
18
comment Solve doesn't solve my transcendental equation
Can you add them too? Maybe it will be useful.
Apr
18
comment Solve doesn't solve my transcendental equation
I fear not, only some approximate solution, or a numeric one.
Apr
18
comment Solve doesn't solve my transcendental equation
Mathematica is unable to solve transcendental equation. Specially, when you have d in various combinations of transcendental functions.
Apr
18
comment Analogue for Maple's dchange - change of variables in differential expressions
For a quiet long time of using Mathematica the Replace and ReplaceAll are more than enough and, actually, I found them much powerful than Maple's dchange.
Apr
18
comment Analogue for Maple's dchange - change of variables in differential expressions
possible duplicate of Change variables in differential expressions
Apr
18
comment Failing to solve a simple PDE with NDSolve
@yep And does the solution looks like the intended?
Apr
17
comment Failing to solve a simple PDE with NDSolve
@yep This works for me: gist.
Apr
17
comment Failing to solve a simple PDE with NDSolve
I have replaced the conditions with DirichletCondition and it solves the equation.