16,688 reputation
41959
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location Ann Arbor, MI
age 76
visits member for 1 year, 9 months
seen 21 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.


Jul
25
revised Spike train representation
Improved formatting; made English more idiomatic
Jul
25
reviewed Leave Closed Conditions under which a given function is less than zero
Jul
25
reviewed Reviewed Conditions under which a given function is less than zero
Jul
25
revised Conditions under which a given function is less than zero
Minor cleanup
Jul
25
revised Suppressing reduction in fraction box size in multi-level fractions
edited title
Jul
25
revised Suppressing reduction in fraction box size in multi-level fractions
Added a second way of solving the problem
Jul
25
answered Suppressing reduction in fraction box size in multi-level fractions
Jul
25
reviewed Close Simplify expression by restricting variable to be integer
Jul
25
reviewed Close why is mathematica 10 much larger than 9 in disk space?
Jul
25
comment why is mathematica 10 much larger than 9 in disk space?
I don't see anything like 8.8 GB for V10 on OS x. I find V10 is using 4.8 GB while V9 is using 3.4 GB.
Jul
24
revised Converting hierarchies of rules to associations
added 2 characters in body; edited title
Jul
24
revised Approximate a function of four variables with a rational polynomial
Made English more idiomatic.
Jul
24
reviewed Close Mathematica 10 : Where is the Mathematica Book?
Jul
24
comment Manipulate inside a function definition slows down when passed a large data set
I didn't use Hold. I gave your function the attribute HoldFirst, which is something different. I did it because Manipulate has the attribute HoldAll, which made me suspicious about passing in the data by value. I was acting on intuition, not out of a deep understanding of Manipulate internals.
Jul
24
reviewed Close Random Packing and moving sphere
Jul
24
reviewed Close How to make Mathematica script executable?
Jul
24
revised Poincare section for double pendulum
added 40 characters in body
Jul
24
answered Manipulate inside a function definition slows down when passed a large data set
Jul
24
revised Manipulate inside a function definition slows down when passed a large data set
Improved formatting
Jul
24
reviewed Leave Closed Generate particals in a cube zone: Need code optimizion