\begin{align}
\dot{x} & = \sigma(y-x) \\
\dot{y} & = \rho x – y – xz \\
\dot{z} & = -\beta z + xy
\end{align}

was generated by adding the following code into the web content

\begin{align}
\dot{x} & = \sigma(y-x) \\
\dot{y} & = \rho x - y - xz \\
\dot{z} & = -\beta z + xy
\end{align}

That’s simply great! People willing to add mathematical content into their wordpress blogs, should check out the MathJax-LaTeX page.

Last February, an interesting book was published entitled “Helvetica and the New York City Subway System: The True (Maybe) Story” by Scott-Martin Kosofsky. The book is about how the Helvertica typeface took over the New York subway.  It seems that very few have anticipated the impact of typefaces in our lives!

http://detexify.kirelabs.org/classify.html

Just draw the symbol and presto the system will show you a number of commands that produce a symbol that looks like the symbol you have drawn! Kudos to the people who have created this web page!