21,203 reputation
42568
bio website none
location Ann Arbor, MI
age 77
visits member for 2 years, 2 months
seen 8 hours 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 its classical Greek synthetic form and in its more modern analytical/transformational form.


8h
comment My algorithm produces too many permutations
This question appears to be off-topic because it is too localized; i.e, it applies only to the local situation and needs of its poster and answers will not benefit others.
9h
revised Derivative of a plot
deleted 23 characters in body
9h
reviewed Looks OK Minimizing a function with a constant $l > 0$
1d
reviewed Leave Open Mathematica 10 ListPointPlot3D PlotTheme bug?
1d
revised Need to utilize FindFit with specified x variable values
Improved formatting
Dec
9
reviewed Reviewed How to take conjugate of a function?
Dec
9
revised How to take conjugate of a function?
Routine clean-up
Dec
9
reviewed Leave Open FindFit working with Integrate but not NIntegrate - I am using “?NumericQ”
Dec
9
comment What are the most common pitfalls awaiting new users?
@rcollyer. I think what you suspect is very likely the case. It certainly seems entirely reasonable to me.
Dec
7
reviewed No Action Needed How do you get a country's GDP per capita in Euros?
Dec
7
revised Time-dependent mesh deformation
Made English more idiomatic
Dec
7
reviewed Reopen Collect is not giving me the result I expect
Dec
7
revised Collect is not giving me the result I expect
Routine clean-up
Dec
7
accepted Unexpected result from StringReplace
Dec
6
comment Unexpected result from StringReplace
@SjoerdC.deVries. Your 1st comment would certainly explain my result. Checking the documentation once more, all the examples I can find of Except used in string operations support your assertion. Can you point me to anywhere it is explicitly documented? Your 2nd comment can be applied not only to this toy problem, but to my real problem as well. If you write it up I will up-vote it and accept it.
Dec
6
revised Creating a List with Lists as entries
deleted 3 characters in body
Dec
6
revised Collect is not giving me the result I expect
deleted 1 character in body; edited title
Dec
6
reviewed Reviewed Picard iteration method by yn(t)
Dec
6
revised Picard iteration method by yn(t)
Improved formatting
Dec
6
asked Unexpected result from StringReplace