12,868 reputation
41653
bio website none
location Ann Arbor, MI
age 76
visits member for 1 years, 6 months
seen 1 min 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.


Mar
3
reviewed Close How do you explicitly define Box Operator (D'Alembert operator)?
Mar
3
revised For loop in Mathematica
added 2 characters in body
Mar
3
answered Solve equation with two different sets of replacement rules
Mar
3
revised For loop in Mathematica
Improved formatting
Mar
2
comment NonlinearModelFit does not find a good fit
Your model seems to very sensitive the initial search value of parameter d. I get a much better fit starting with d = 1/200.
Mar
2
reviewed Close How can you convert a matrix back into a list of lists?
Mar
2
revised NDSolve with varying PrecisionGoal and WorkingPrecision
Made English more idiomatic.
Mar
1
revised How to export data in scientific form
General cleanup
Mar
1
reviewed Close Check if a (possibly nested) list is real
Mar
1
revised Stopping a head from evaluating more than once
added 11 characters in body
Mar
1
revised How to transform an equation so that the coefficient of a certain term becomes 1
Improved formatting
Mar
1
revised Why is Solve returning an empty list?
General cleanup
Mar
1
revised Copy and paste behaviour with Subscript
edited tags; edited title
Mar
1
revised How to assign Subscript[C, i] to a Sum?
General cleanup
Feb
28
reviewed Looks Good Apply a function to each element of a list and sum it
Feb
28
revised Getting error FullSimplify::infd: … simplified to ComplexInfinity
deleted 8 characters in body; edited title
Feb
28
revised Getting error FullSimplify::infd: … simplified to ComplexInfinity
Improved formatting
Feb
28
revised Green functions for recurrence equations
deleted 9 characters in body; edited title
Feb
28
reviewed Reviewed Apply a function to each element of a list and sum it
Feb
28
revised Apply a function to each element of a list and sum it
Improved formatting