Wood, paint, metal, chalk.
This work is a re-interpretation on a chalkboard of a diagram found in an academic paper published in 2003 by C Glocker and C Studer from the IMES-Centre for Mechanics, Zürich, Switzerland. The paper refers to the theoretical study of “linear complementary problems”. This study is demonstrated by using the classic “woodpecker toy going down a metal rod” as an example of a typical “low dimensional system”. The letters A, B & Y stand for “Professor Augustus Barclay Yaffle”, the drily wooden woodpecker bookend of the children programme “Bagpuss”.