21,434 reputation
246105
bio website sites.google.com/a/unca.edu/…
location Asheville, NC
age
visits member for 2 years, 10 months
seen 15 hours ago

I've been a professor of mathematics at The University of North Carolina - Asheville since 1997. I've been using Mathematica since I started graduate school in mathematics at Ohio State in 1989. At that time, we used version 1.1 (as I recall) to teach calculus in our Calculus and Mathematica classes. I've used it pretty much continuously in my teaching and research since then.

In addition to my posts on SE, you can find some of my papers, teaching notebooks and other Mathematica based oddities strewn throughout my website.

In recent years, I've also worked as a part-time consultant to Wolfram Research focusing on development of mathematical content for WolframAlpha.


Sep
27
comment Plotting Semi-hollow spheres
In light of the post of @belisarius, I wonder if the answers here contributed significantly to your cover image? If so, attribution (which I don't see, but might have missed in the article) would be appropriate.
Sep
27
answered Fitting ellipse to 5 given points on the plane
Sep
27
comment Enumerating all connected graphs with 9 vertices
getConnG[7] in about 6 minutes.
Sep
27
comment Bifurcation diagrams for multiple equation systems
@belisarius I saw that question but was not quite able to figure a good way to approach it. At least, not given the kind of time I've got these days!
Sep
27
comment Enumerating all connected graphs with 9 vertices
I modified your code slightly so that getConnG[6] runs in 5 seconds as opposed to 30 seconds on my machine. The major point is that DeleteDuplicates has quadratic time complexity when using a user defined comparison function. Thus, breaking the list of graphs in smaller parts using the total number of edges helps a lot. Of course, DeleteDuplicates can run like $n\log(n)$, when the data is linearly ordered, but that's not generally possible with a user defined comparison function.
Sep
27
revised Enumerating all connected graphs with 9 vertices
added 98 characters in body
Sep
24
awarded  Autobiographer
Sep
24
comment What's wrong in FunctionPeriod?
I don't think this is a duplicate, as the other question predates FunctionPeriod. Also, while FunctionPeriod builds on the Periodic context, there are differences. I guess I'd say it's a bug but I doubt that it's a very high priority bug.
Sep
24
revised What's wrong in FunctionPeriod?
added 199 characters in body
Sep
24
answered What's wrong in FunctionPeriod?
Sep
23
comment Unable to compile to C
Works for me with 10.0.1 on Mac OSX. Did you recently update? What's your platform?
Sep
23
comment Combining many plots with Show produces wrong x-axis position and wrong filling
@rcollyer Yes, I think you're right. I guess my approach fixes the problem precisely because it forces the AxesOrgin to be the same throughout.
Sep
23
comment getting vertices in order from spanning tree
I get a sequence of errors of the form: Function::flpar: Parameter specification Append[vlist,#1] in Function[Append[vlist,#1],1] should be a symbol or a list of symbols. >> I guess this can be fixed using SetDelayed rather than Set.
Sep
23
comment Combining many plots with Show produces wrong x-axis position and wrong filling
The problem is that the filling is generated to fit within each individual plot range. So just set the PlotRange in each of the plots individually, rather than just in the Show command. That way, the filling will fill the whole common plot range.
Sep
20
awarded  Nice Answer
Sep
19
comment Understanding differences between Maple and Mathematica in examples picked by Maplesoft
@DanielLichtblau Oops - better?
Sep
19
revised Understanding differences between Maple and Mathematica in examples picked by Maplesoft
added 370 characters in body
Sep
19
answered Understanding differences between Maple and Mathematica in examples picked by Maplesoft
Sep
19
comment What is going on here? (Wolfram|Alpha)
@martin Glad to hear it! I try to answer WA questions, quickly. :)
Sep
19
answered What is going on here? (Wolfram|Alpha)