23,667 reputation
42672
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location Ann Arbor, MI
age 77
visits member for 2 years, 5 months
seen 1 hour 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.


2h
revised Poisson PDE in a rectangular domain
Improved formatting
2h
revised Poisson PDE in a rectangular domain
Routine clean-up
2h
reviewed No Action Needed Is the letter “s” special in Mathematica?
7h
reviewed Leave Closed What is the meaning of two square brackets in function definition?
7h
revised Counting and updating a subset of matrix
deleted 3 characters in body
8h
comment How can I translate ExpIntegralEi (Mathematica function) in Matlab?
I'm voting to close this question as off-topic because question about implementing algorithms in matlab do not belong on this site
11h
revised Why is there always a horizontal tail line on the parametric curve?
Improved formatting; edited tags
11h
revised Barlegend with a different z span for ListDensityPlot
Routine clean-up
20h
revised Unexpected results from output with NumberForm and ScientificForm
deleted 29 characters in body; edited tags; edited title
20h
revised Defining a function that resembles another function
Improved formatting
20h
revised Defining a function that resembles another function
Improved formatting
20h
comment Defining a function that resembles another function
Is this question about Mathematica or about mathematics?
21h
comment Why can't I change the style of a cell repeatedly?
@sacratus. I think it would be good if you were to post your comment as an answer. I will certainly up-vote if you do. I would be interested if would give details of contents of the "attached notebook" referenced in tech support reply.
1d
revised How can I solve my easy system of equations?
Fixed typo
1d
revised Plot gives different result than direct evaluation (Plot[f[x]] obtains answer while f[x] fails)
deleted 16 characters in body
1d
revised Laplace PDE in a polar coordinate system
Routine clean-up
1d
reviewed Edit How to resolve the conflict of keyboard shortcuts and customize all shortcuts?
1d
revised How to resolve the conflict of keyboard shortcuts and customize all shortcuts?
improved question formatting; made English more idiomatic
1d
reviewed Approve How do I get my equation to have the form $(x-a)^2 + (y-b)^2 + (z-c)^2-d = 0$?
1d
reviewed Edit How can I get the inverse of my function?