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1d
comment How to make an empty list inside a module program? It consatly spews errors
It is a good idea to start all of your symbols with lowercase letters: ex, myList.
2d
awarded  Nice Answer
Feb
2
comment Strange behaviour of NotElement in Reduce
If you use Traceyou will see what happens with your last two statements: In the first case (Integers) the 1/2 stays inside the Reducemaking it false. The condition Element[ 1/2 + x, Rationals] though can be reduced to Element[ x, Rationals ] since for any Rational this should hold; the 1/2 vanishes making this work out. I admit unintuitive. :)
Feb
2
comment Strange behaviour of NotElement in Reduce
... you can also validate this hypotheses in your third example: Sqrt[2] is not a rational making the whole thing False.
Feb
2
comment Strange behaviour of NotElement in Reduce
The documentation for Reduce says that Reduce[expr,vars,dom] restricts all variables and parameters to belong to the domain dom. Since in the first example 1/2 does not belong to Integers that makes it False. Reduce[ x== 1 && NotElement[ x + 1/2 ], x] therefore does what it should do.
Feb
2
revised Maximizing a recursive functional equation
corrected error in code
Feb
2
comment Maximizing a recursive functional equation
I used MaxValue (and also NMaxValue) but Maximize might work also. Hope that helps.
Feb
2
answered Maximizing a recursive functional equation
Feb
1
comment Is the free Mathematica Trial Version a full version?
I would also add that the question touches performance issues (eg. the number of kernels in an edition). So maybe we should also not ask about differences in Version between Mac OS and Windows?
Feb
1
comment Is the free Mathematica Trial Version a full version?
@MarcoB "Because at some point in the future the answer would inevitably become obsolete and therefore generate confusion, which would make it worse than useless" -> Well that would indeed hold for any Change in Version maybe and concerns a lot of threads here on SE? Also one anybody can see the date of the information and can judge for himself.
Feb
1
revised Conditional probability syntax
corrected error in code
Feb
1
comment Is the free Mathematica Trial Version a full version?
I would keep this question open because the question is on topic and legitimate and the only issue there is may be uncertainty in any answer not coming directly from WRI. But why not including maybe an official answer from WRI so one would have it for further reference? I for once noted that I rather search on SE than on the WRI pages for some reason...
Feb
1
answered Conditional probability syntax
Feb
1
comment Is the free Mathematica Trial Version a full version?
I had recently downloaded a trial version for my daughter and it was showing "Home Edition" if I remember correctly. Thus the trial version should have the (minor) restrictions of the "Home Edition": 4 Kernels for evaluation (instead of 8), 1 Frontend (instead of 2) and less calls to Wolfram Alpha. (I refer to the German reseller information for the Home Edition)
Feb
1
comment Conditional probability syntax
The syntax for statistics is very close to mathematics using Probability and Distributed as its workhorses. For a more comprehensive reference see here and this example 98913.
Feb
1
comment Generating Tuples with restrictions
This is of course a very general approach and probably a bit overdone here. For better readability I have used the symbol x but I would recommend to use \[FormalX] instead.
Jan
31
revised Max of imported numerical data will not work
Added tag import and modified title to more concisely address the problem
Jan
31
comment Sum of difference between dates do not match
Please add some code and you may also upload your graphic directly.
Jan
31
suggested approved edit on Max of imported numerical data will not work
Jan
31
revised Max of imported numerical data will not work
Modified Select-expression to give FullForm