16,574 reputation
41959
bio website none
location Ann Arbor, MI
age 76
visits member for 1 year, 9 months
seen 53 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.


2d
reviewed Close What is wrong with ContourPlot
Jul
23
comment How to generate nonperiodic tilings?
Looking at the image and seeing there is a sub-tiling that forms a rectangle, it seems clear that a periodic tiling is possible with kite and rectangle tiles. In fact, I can see at least three different periodic tilings.
Jul
23
reviewed Close Plot a perfect looking circle using two functions, always look like an ellipse
Jul
23
reviewed No Action Needed Problems with NMinimize
Jul
23
comment How to generate nonperiodic tilings?
This looks to me to be a pure Tom Sawyer request. The OP seems to be saying "This problem is too hard for me, so will someone do it for me?". I say: close it as too broad.
Jul
23
revised How to generate nonperiodic tilings?
deleted 8 characters in body; edited tags
Jul
23
comment Plot a perfect looking circle using two functions, always look like an ellipse
I can't find a question which I think this one duplicates, but this question is addressed in the docs under Plot > Examples > Options > AspectRatio. So suggest closing as "easily found in the documentation".
Jul
23
reviewed Close Making a Logplot with errorbars
Jul
23
reviewed Leave Closed How to solve an integral equation by iteration method?
Jul
23
reviewed Close Take the function f(x)=2x-x^2 and the open interval P=(0,2) why is f(P)=(0,1]? why is that 1 closed?
Jul
23
comment Deriving a simple equation to determine score for matched words against search text
Why are you asking this question on this site. The question you link to is on stack overflow. Why didn't you post this one there? Did you mean to post on the Math.SE site and confuse this one that one?
Jul
23
reviewed No Action Needed Deriving a simple equation to determine score for matched words against search text
Jul
23
reviewed Edit List of Coefficients of Expression with symbolic Terms
Jul
23
revised List of Coefficients of Expression with symbolic Terms
Improved formatting
Jul
23
revised I see error messages when I use LogLinear Plot but not when I use Plot
added 15 characters in body; edited title
Jul
23
revised How can I scale a plot in my Manipulate?
Major clean-up
Jul
23
reviewed Leave Open Making a fit to my empirical data
Jul
23
revised Converting datasets to nested lists
Added a slightly improved method
Jul
23
revised Making a fit to my empirical data
edited tags; edited title
Jul
23
reviewed Close Plotting vector field