In addition to the usual lecture files:
	l4.ppt		l4.html		l4.pdf

this directory also contains some examples of how to use
regular expressions inside of Emacs

The first example shows how to automatically indent certain math formulas:
	formula_before.html	formula_after.html  (command explained in second file)

The second example shows how to create a list of hyperlinks for a simple list:
	linklist_before.html	liklist_after.html  (command explained in second file)

The third example shows how to strip an html file of all tags:
	html_before.html	text_after.txt		command.txt (command used)