Senhor de Barros is a Brazilian artist who does a quite a bit of wonderful geometric abstract work. See: [url]http://www.geraldodebarros.com/main/?page_id=582[/url] for more.[br][br]This sketch is trying to generalize the first de Barros painting I saw, via tophat77: [url]http://peano.tumblr.com/post/126411650460/topcat77-geraldo-de-barros[/url][br][br]Some very interesting (to me) visual fractions form in these digital images.

More GeoGebra at [url]bit.ly/mh-ggb[/url]