Update: April 30, 2014

Some minor updates.

  1. I've added Riemann sum graphics to the Graphics page. The code uses Tikz and sagetex to
  2. Fixed a broken link for the arccos graph on the same page.
  3. I've added a link for books (programming and math) that are on GitHub. You can find it on the sidebar.
  4. You can find an article on infinitesimals and modern math here

Update: April 21,2014

Several small changes:

  1. A sidebar link to an online LaTeX compiler wasn't giving access to the online compiler so the that link was removed. It's been replaced by: JaxEdit. It's "an online LaTeX editor with instant preview" according to the website. You can find the link on the sidebar under LaTeX.
  2. I've added a link to the American Mathematical Society's Google Plus page. The link is on the sidebar under Mathematics.
  3. There's a link to the Aperiodical on the sidebar under Mathematics. Make sure to check out the monthly Carnival of Mathematics.
  4. As I mentioned earlier, it's Math Awareness Month and mathaware.org is posting a new video each day. Richard Wiseman's video "The Prediction" is far and away my favorite; my students enjoyed it as well. I've added the link to my Other page as well. If you haven't seen it, make sure you take a look.

Sagetex: Implicit disconnected plots with pgfplots

ImplicitPlotDisconnectedIn an earlier post I put together some code to illustrate how sagetex could be used to create an implicit plot, provided the plot was connected. If the graph is disconnected, such as a hyperbola, then the code would only plot 1 of the pieces. I've modified the code to handle disconnected implicit plots, such as the screenshot above. The template is posted on the Plotting with Sagetex page.

LaTeX emphasis: soul package

SoulPackageIf you took the time to explore the website in point 3 of the last post, you might have come across the soul package. The soul package gives you even more ways to emphasize text. You can:

  1. increase the spacing between the letters
  2. small/large capitals
  3. highlight text
  4. strike through text
  5. underline text

The capabilities are illustrated in the screen shot above. I've added this information to the page on emphasizing text, along with a template/example to illustrate the basics.

Odds and Ends: April 5, 2014

1. I've added explanations on the probability of 4 of a kind and a full house. You can download the files from the Handouts page.

2. April is Math Awareness Month. Head on over to the Math Aware website and check out the Activity Calendar. With each day that passes a video and activity is revealed. As the website says, "Each page also includes activities for engaging with the underlying mathematical ideas at a variety of levels, with challenge questions, written explanations, and references.".

3. This website shows off the Aurial handwriting font. It looks great and, if you take the time to look around you'll notice some nice $latex \LaTeX$ templates here.

Updates: April 1, 2014

There's a new website, PGFPlots.net, that showcases the some elegant pgfplots examples. If you're a fan of TeXample.net (and who isn't?!?) then you'll like love this site, too. Both sides are run by Stefan Kottwitz and PGFPlots.net already has a good selection of plots. The only drawback is that a bunch of the examples don't work when you open them online because you need something else (e.g. gnuplot/luatex to get them to work. The Mandelbrot Set example was something I wanted to see running but if you click on "Open in WriteLaTeX" it won't run because LuaTeX is needed. Too bad sage isn't used for computations via Sagemath Cloud.

I've added a link to PGFPlots.net on the sidebar. And while I was Tikz/pgfplots was on my mind, I added to the LaTeX page. There are now links to TikZ/pgfplots documentation, pgfplots manual, and a Minimal Introduction to TikZ. All three additions are long overdue as I migrated to Tikz/pgfplots some time back thanks to Stefan Kottwitz, Alain Matthes (Altermundus website), and the ability to combine sage with tikz and pgfplots.