19,817 reputation
24193
bio website sites.google.com/a/unca.edu/…
location Asheville, NC
age
visits member for 2 years, 7 months
seen 2 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.


Jul
18
comment Game of Life in 3D
@eldo And thank you. It is definitely more life like, now. :)
Jul
18
comment Generate Random 3D Network using GraphPlot3D and loop
@Schwarz You should upvote this, if you found it useful. I did.
Jul
17
comment How do I plot points on a sphere using spherical coordinates?
Could you share your points?
Jul
16
comment Fitting the Plot by fourier Series of either sine or cosine
Can you provide all the data?
Jul
16
comment Is this a bug in FunctionDomain (V.10)?
I don't think your Maple comparison is quite fair. You've explicitly asked Maple to solve an inequality, rather than asked for the domain of a function. That doesn't account for more complicated examples, as I've placed in my answer.
Jul
15
comment What information is sent to Wolfram Research when loading or working with Mathematica?
Well, I vote to reopen.
Jul
14
comment Rough mesh lines in partially opaque 3D plots
I don't have a windows machine handy to try this at the moment but you might try rasterization. Something like Rasterize[pic,RasterSize->1000,ImageSize->500]. The result is non-rotatable but, in my experience, yields a very nice image which is quite suitable as a standalone image or for export.
Jul
14
comment How to find valleys of data using new function in V10 PeakDetect
Apply it to $-f$?
Jul
10
comment How do I solve a PDE with a strange boundary condition?
Thanks - mystery man!
Jul
2
comment Problems with NIntegrate
@Chenminqi Or, perhaps \[Pi]^2, as it now appears in the code block.
Jul
1
comment Unexpected Plot3D behaviour
You can also do h[u_] = pol1^2 - pol2^2 /. x -> u in your definition of h, i.e. Set, rather than SetDelayed.
Jun
27
comment Finding maximum or minimum of implicit functions
@Algohi - I've edited your question. Please make sure that I've retained your intended meaning.
Jun
25
comment Simple derivative not working
Glad it helped! Markdown in comments is somewhat different than markdown in a post, I believe.
Jun
23
comment Problem With NDsolve trying to simulate n-body-gravity problem
You might be interested in this notebook, which contains code to deal with a fairly large number of objects specified in {mass,pos,vel} form. When two objects collide, however, a singularity arises and you simply cannot expect to integrate past that point. You can use InterpolatingFunctionDomain to deal with it gracefully but that's about it.
Jun
16
comment Solution given by Wolfram Alpha but not _Mathematica_
The WolframAlpha result can be produced with Reduce[Log[x] == Log[j, Log[j, x]], j, Reals]. In general, you should not assume that Mathematica commands typed into WolframAlpha will be executed verbatim on the server side.
Jun
3
comment plotting a trig functions along with its envelope
I edited your question. You should make sure that I preserved your intended meaning.
Jun
3
comment plotting a trig functions along with its envelope
In that case, your sheath is given pretty much perfectly by $\pm 2\cos(t/2)$, but maybe that's not what you want?
Jun
3
comment plotting a trig functions along with its envelope
Well, you've got to give us some kind of input to start with.
Jun
3
comment plotting a trig functions along with its envelope
I'm guessing that's something like Cos[42x]+Cos[43x]?
May
21
comment 2D Visualization of links and knots
@RahulNarain I won't be using it anytime soon so feel free!