A nice way to embed ActiveMath items, for instance in a blog, is to use ClipMarks. Get an account and install the Firefox/IE plugin. Then go to any web site, press the ClipMarks button, and select any span or div item on the web site. A tiny menu on the top will be presented from which you can select an action. Choose “Blog” and a popup windows opens asking you for some information. I send my clipmarks to my WordPress based blogs. Unfortunately, WordPress has the feature to push any entry through a set of filters which cause an autoinsertion of paragraph and linebreak tags. So, to get the content right, you have to:

• Install the WP Unformatted plugin
• Add ActiveMath specific css definitions

See how great this is!

clipped from devdemo.activemath.org Definition of the average slope between two points In order to determine the average slope of a curve between two points P=( xP,yP) and Q=( xQ,yQ), one replaces the curve by the straight line through P and Q (i.e. by the secant through P and Q). The average slope of the curve between P and Q is then defined to be the slope of this straight line PQ: mPQ= yQ-yP xQ- xP .