About: http://webisa.webdatacommons.org/335391756

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I guess most math problems are like that Also, I think your currHeight and prevHeight are swapped in the diagram - should not the previous height be higher than the current one?
http://www.w3.org/ns/prov#wasQuotedFrom	gamedev.net