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1d
comment How do I solve for the real and complex parts of an equation simultaneously?
You shouldn't guess how to use a function, but look it up in the built-in documentation. Your suggested use of ComplexExpand is simply wrong.
Jul
24
comment Approximate a function of four variables with a rational polynomial
If you want to provide multiple values for each of the parameters then they are just variables. Your approximant can not automagically be valid for all possible values that they can assume. They only thing you can do is to make the procedure you use to approximate your function dependent on the parameter values so that you derive a different approximation for every set.
Jul
24
comment xCoba: evaluate tensor quantities, given an explicit metric
Mathematica.SE user Teake Nutma is one of the xAct contributors.
Jul
24
comment xCoba: evaluate tensor quantities, given an explicit metric
Crossposted to the xAct forum.
Jul
24
comment Classify - no memory available
You could try the option PerformanceGoal->"Memory".
Jul
24
comment Mathematica 10 : Where is the Mathematica Book?
I see some close votes, but I don't think it is a good idea to close this question. For new users, the solutions offered in the comments are not readily found.
Jul
24
comment Aborts and beeps without error warning
@MichaelE2 Just trying to explain your intermittent results. Doesn't look like memory is an issue ;-)
Jul
23
comment Aborts and beeps without error warning
@MichaelE2 Perhaps you're in a borderline memory squeeze?
Jul
23
comment Take the function f(x)=2x-x^2 and the open interval P=(0,2) why is f(P)=(0,1]? why is that 1 closed?
Is this question about the software product called Mathematica, or about math?
Jul
23
comment Aborts and beeps without error warning
@TomJS See picture.
Jul
23
comment Aborts and beeps without error warning
If you put the definition of f in a separate cell it seems to work fine.
Jul
23
comment Aborts and beeps without error warning
What's the use of the Null in the If function?
Jul
23
comment Retrieving other information on CountryData
I note that none of the listed sources dates from after 2008, so this actually doesn't source the above piece of information...
Jul
23
comment Error solving third order ODE in version 10. No error in V9. DSolve`DSolveKovacicDump`
I get error messages both in v9 as in v10. You may have redirected your messages in V9 to the Messages screen. Looks like a case for support@wolfram.com.
Jul
23
comment Mathematica 10 fails to calculate integral that Mathematica 9 can handle
I can confirm that I get the same results as the OP. My suggestion would be to report this to support@wolfram.com.
Jul
22
comment Swap elements in list without copy
@Mr.Wizard Have you seen my email?
Jul
21
comment Progress Indicator & sums
@martin yes, no problem. Monitor[Sum[Pause[0.1]; x, {x, 1, 100}], Row[{ProgressIndicator[x, {1, 100}], x}, " "]]
Jul
21
comment Progress Indicator & sums
I don't think this is the issue the OP is referring to. It's not the slowness (the OP added a Pause for a purpose), but the fact that the progress indicator starts anew multiple times.
Jul
21
comment Progress Indicator & sums
Your assumption that Plot goes from 2 to 1000 in small steps is incorrect.The plot process is recursive, with places that bend too much being refined in later stages.
Jul
21
comment Swap elements in list without copy
@Mr.Wizard Hmmm, if I copy this back, my results differ; strange...