23,452 reputation
42672
bio website none
location Ann Arbor, MI
age 77
visits member for 2 years, 5 months
seen 19 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. My main reason for joining StackExchange is to participate in Mathematica.SE. I enjoy answering question when I can, but I also enjoy working at making the site a better place to visit.

I started using Mathematica in 1997 (Ver. 3). I am currently using Ver. 10.0.2. 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.


8m
reviewed Reviewed If perhaps not is only one going to be launched any time in the future, I attempted both greenpois0n and limera1n without achievement?
10m
comment If the earth's rotational speed increased by 2% each day starting today…what would be the difference in age 20 years from now?
@2012rcampion. No, it's more a physics problem. The answer would be no one would of any age because nobody would survive such a change of rotational speed. I suspect the planet itself would disintegrate.
18m
revised Plot 3D with conditions and variables dependent on each other
Routine clean-up
27m
answered Ordered associations
45m
revised Ordered associations
added 17 characters in body; edited tags; edited title
48m
answered DatePlus and DayPlus perform much worse than my user-defined-function
1h
revised DatePlus and DayPlus perform much worse than my user-defined-function
Routine clean-up
13h
comment How to change plot unit or scale the number of axis?
@ChadMeng. Remove the // N
13h
comment How to iterate through a list of rules?
Your question implies that some or all the keys and values in your list are strings, but in your post they all look like symbols or rational numbers. Please reformat your example to make the strings explicit.
13h
revised How to iterate through a list of rules?
Minor clean-up
13h
revised Another square-root simplification problem
edited title
13h
revised Delete duplicates by a criteria
Routine clean-up
17h
awarded  Enlightened
17h
awarded  Nice Answer
21h
revised What are the most common pitfalls awaiting new users?
deleted 2 characters in body
23h
revised How can I insert an element every $n$th position in a list?
Made English more idiomatic
23h
revised Eliminating parameter from parametric equation
Major clean-up
23h
revised Eliminating parameter from parametric equation
Major clean-up
1d
revised Want to compute the permutations of {1, 2, …, 11} with only 3 GB of memory
edited tags; edited title
1d
comment Want to compute the permutations of {1, 2, …, 11} with only 3 GB of memory
There are about 40,000,000 such permutations. What are you planning to do with them if you were able to compute them all?