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location Ann Arbor, MI
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visits member for 1 year, 10 months
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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.


Jul
7
revised Defining a function that differentiates another function with rule replacement
added 1181 characters in body
Jul
7
revised The mysterious gap inside Grid
corrected typo
Jul
7
comment Defining a function that differentiates another function with rule replacement
@matheorem. I don't have time now to update my answer to explain how your code goes wrong. I will do so latter today. As for a link on non-symbolic heads, look at this
Jul
7
reviewed Leave Open Saving graphics in Adobe Illustrator .ai format
Jul
7
answered The mysterious gap inside Grid
Jul
7
comment Switch inside Manipulate controls statement
+1 -- Evidently Nasser and I were wrong in thinking one could not put a Switch in a Manipulate.
Jul
7
revised Switch inside Manipulate controls statement
Improved formatting
Jul
7
comment Switch inside Manipulate controls statement
@Nasser. You're right, but if we had the full code, someone could provide a work-around.
Jul
7
comment Switch inside Manipulate controls statement
It would be helpful to those who would like answer your question to have your full Manipulate expression and support code it depends on. Please edit your question by adding that code.
Jul
7
reviewed Close Why does pattern test not work in this case to restrict the function parameters?
Jul
7
reviewed No Action Needed Switch inside Manipulate controls statement
Jul
6
revised Defining a function that differentiates another function with rule replacement
More general definition of hhpar
Jul
6
reviewed Close How to avoid plotting lines not defined in a Which function?
Jul
6
revised SetPrecision — different values subtracted from unity gives same value
Improved formatting
Jul
6
revised Friday the 13th related tables
Minor clean-up
Jul
6
comment Why does pattern test not work in this case to restrict the function parameters?
Your question contains so much extraneous material that I find it is hard to determine what you are really asking. In particular, in most cases we don't need images of your notebook cells. You can include evaluation results, except for graphics, using normal markdown formatting.
Jul
6
revised Defining a function that differentiates another function with rule replacement
edited tags; edited title
Jul
6
answered Defining a function that differentiates another function with rule replacement
Jul
6
revised SetPrecision — different values subtracted from unity gives same value
Moderate clean-up
Jul
6
reviewed Close Tensor product involving Levi Civita symbol