20,314 reputation
42468
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location Ann Arbor, MI
age 76
visits member for 1 year, 11 months
seen 7 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.


6h
awarded  Nice Answer
11h
reviewed Reviewed How to simplify symbolic matrix multiplication using the associativity of scalar multiplication?
11h
revised How to simplify symbolic matrix multiplication using the associativity of scalar multiplication?
Major clean-up
11h
answered Select pairs of columns from an array of data
12h
reviewed No Action Needed How a novice user better understand the Q/A
12h
comment My Baum-Welch algorithm is very slow. Is it due to Mathematica?
Perhaps this would be better as a comment to the question.
12h
revised Select pairs of columns from an array of data
Major clean-up
12h
comment My Baum-Welch algorithm is very slow. Is it due to Mathematica?
While this link may answer the question, it is better to include the essential parts of the answer here and provide the link for reference. Link-only answers can become invalid if the linked page changes.
18h
revised How to deal with recursion formula in Mathematica?
Added a general precept applicable to tail recursion
19h
revised How to deal with recursion formula in Mathematica?
added 21 characters in body
19h
comment How can one get rid of the “Template notebook” bar in Mathematica?
It's a nasty bug. I've run into it, too. What you did -- saving your work into a new notebook -- is the only work-around I know.
19h
revised How to deal with recursion formula in Mathematica?
Added Fibonnaci example
20h
answered How to deal with recursion formula in Mathematica?
21h
comment How to deal with recursion formula in Mathematica?
What version of Mathematica are you using? In V10 on OS X and, I think V9 as well, the default value for $RecursionLimit is 1024.
21h
reviewed Reviewed Replacing variable names in a notebook
21h
revised Replacing variable names in a notebook
deleted 44 characters in body; edited tags; edited title
1d
answered Numerical integration with NIntegrate
1d
revised Numerical integration with NIntegrate
Routine clean-up
1d
revised Call Mathematica function From .NET
Improved formatting
1d
awarded  Explainer