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41653
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location Ann Arbor, MI
age 76
visits member for 1 years, 6 months
seen 10 mins ago

I am a retired software developer. I retired at the end of 2003 and since then my computer programming activities have been for recreational purposes. I find Mathematica excellent for that.

I started using Mathematica in 1997 (Ver. 3). I am currently using Ver. 9. Although I have used Mathematica for all kinds of stuff, I use it mostly to pursue my long standing interest in Euclidean geometry, both in the classical Greek synthetic form and in the more modern analytical form.


Dec
28
reviewed Reviewed Working with a system of differential equations that cannot be solved explicitly
Dec
28
revised Working with a system of differential equations that cannot be solved explicitly
General cleanup
Dec
27
revised Question about variable name autocompletion in $Mathematica$ 9 on OS X
General cleanup
Dec
27
revised Question about variable name autocompletion in $Mathematica$ 9 on OS X
Improved formatting
Dec
27
comment Question about variable name autocompletion in $Mathematica$ 9 on OS X
Very similar to this question,
Dec
27
revised Plot discontinuous function with black and white disks marking discontinuities
General cleanup
Dec
26
revised Is it Possible to change dashes into circles with Plot command?
Added explanation of how to deal with two curves to answer question raised in a comment
Dec
26
revised Permutation count for sets with multiplicities
General cleanup
Dec
26
comment How to randomly select and open a notebook using CDFPlayer
I don't know much about what is OK on the free CDFPlayer, but maybe FileNames[{"*.nb"} is disallowed because it looks as if you were fishing for what files are available. Try Button["open", Print @ RandomChoice[FileNames[{"*.nb"}, {NotebookDirectory[ButtonNotebook[]]}]]]. It might give you more insight.
Dec
26
revised How to randomly select and open a notebook using CDFPlayer
General cleanup
Dec
25
answered Is it Possible to change dashes into circles with Plot command?
Dec
25
comment How many Christmas gifts?
@Rojo. Write up your two comments as a answer and I both up-vote and accept it.
Dec
25
revised Error message concerning Graphics`Colors`
edited tags; made english more idiomatic; improved formatting
Dec
25
revised Error message concerning Graphics`Colors`
edited tags
Dec
25
reviewed Close Problem with NIntegrate
Dec
25
reviewed Close solve a stochastic partial differential equation
Dec
25
comment How many Christmas gifts?
@Rojo. Indeed, and which evaluates to?
Dec
24
reviewed Close How to find near circular objects in an image
Dec
24
awarded  Popular Question
Dec
24
awarded  Nice Question