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awarded  functions
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Apr
13
comment Drawing nodal lines of wave equation
@Pickett it is not an answer, that is why it is a wiki.
Apr
13
comment string and subscript in label
fyi, I am not sure that using tab "\t" is recommend for spacing, as it might generate different space amount depending on the platform or some other system configuration. I think Spacer[n] is supposed to generate the exact space on all systems. (mac, linux, windows)
Apr
13
answered Drawing nodal lines of wave equation
Apr
13
revised string and subscript in label
added example using matex
Apr
13
comment Writing a circular matrix
+1 just for the coloring part :)
Apr
13
comment Extract the square root of $\left(\frac{y^2+1}{y^2}\right)^2-8\frac{y^2-1}{y^2}+14$
may be Op wanted: Clear[y]; expr = (y^2 + 1/y^2)^2 - 8 (y^2 - 1/y^2) + 14; ComplexExpand@Sqrt[expr] ? Just guessing...
Apr
13
answered Integrating ODE's
Apr
13
answered string and subscript in label
Apr
13
revised How can I perform this integration in Mathematica?
added 524 characters in bodyadded symbolic
Apr
13
comment How can I perform this integration in Mathematica?
@Dimitrios I updated answer
Apr
13
comment Time series package in mathematica 9
If you mean this time series, then it is third part app, that you need to buy. So it is separate. I did not know about a time series package. Do you have a link?
Apr
13
answered How can I perform this integration in Mathematica?
Apr
13
awarded  Revival
Apr
12
comment Problems solving/plotting a differential equation
It's just the good ol' mass-spring-damper system. Well, it is a special spring you have and not the good old one. You have non-linear spring, so this makes it hard to find closed form solution. Are you saying Mathematica solved this analytically before?
Apr
12
comment How to map over inner keys of nested Associations?
Your code has syntax errors
Apr
12
answered Writing a circular matrix
Apr
12
comment How to switch from array to string?
Nice. Btw, this does not give the same form the OP wanted due the "," being there between the numbers. May be just need small modification?