18,206 reputation
41962
bio website none
location Ann Arbor, MI
age 76
visits member for 1 year, 10 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 the classical Greek synthetic form and in the more modern analytical form.


Jun
15
revised Euler's method for a 2nd order ODE
Major clean-up
Jun
15
comment How to plot two sets of points in diferent colors with Epilog?
Two points. 1) I've reformatted your code once again, but -- really -- you have asked enough questions by now to know how we want questions formatted. You should take a little extra time and format any future questions better. 2) Your self-answer is correct, but it shouldn't be added to your question. You should cut it from your question and paste it into an answer field.
Jun
15
revised How to plot two sets of points in diferent colors with Epilog?
Improved formatting
Jun
15
reviewed Reopen How to plot partial derivative of an integral vs. another variable?
Jun
15
reviewed Close What should I expect for Fourier transform of Sinc?
Jun
15
revised How to open Mathematica from the terminal in OS X
edited title
Jun
15
revised What should I expect for Fourier transform of Sinc?
Moderate clean-up
Jun
15
comment Problem with using the chain rule
I think your expectations are bit odd. You seem to expect Mathematica to evaluate some instances of x, but not others. How do you think it could know which instances should get evaluated and which should be ignored?
Jun
15
revised Problem with using the chain rule
Moderate clean-up
Jun
15
reviewed Reviewed Simplifying an expression containing radicals
Jun
15
revised Simplifying an expression containing radicals
Minor clean-up
Jun
14
revised Why does Maximize return a wrong answer?
Moderate clean-up
Jun
14
revised Extract memoized results in the form of a rule
edited title
Jun
14
revised How to open Mathematica from the terminal in OS X
Moderate clean-up
Jun
14
revised Rounding only coefficients
Improved formatting
Jun
14
revised Extract memoized results in the form of a rule
Minor clean-up
Jun
14
revised Extract memoized results in the form of a rule
added 28 characters in body
Jun
14
answered Extract memoized results in the form of a rule
Jun
14
comment Extract memoized results in the form of a rule
I like this, but there is a problem with it. Although it works for the OP's example date, it won't work for a memoized function like f[0] = 1; f[x_Integer] := f[x] = f[x - 1] + 1/x.
Jun
14
awarded  Enlightened