.html files and their folders in http://www.singacom.uva.es/Actividad/s3cm/Archivo/S3CM09/Sevilla/published_files/ :

course outline (interactive)
.png files: course outline (image)
.sws files: files for sage (free open source mathematics software)
Instructions: use the html or png files to navigate the contents; examples and other content in sage are indicated there with a red pencil icon.

Sage worksheets are available in (ask the lecturer for the source code)
http://www.sagenb.org/home/pub/689
http://www.sagenb.org/home/pub/690
http://www.sagenb.org/home/pub/691
http://www.sagenb.org/home/pub/692
http://www.sagenb.org/home/pub/693