»trail« harks back to a path that Natascha Sadr Haghighian laid out at the Auehang in Kassel in 2012 as part of dOCUMENTA (13).

James R. Murphy, a math teacher in La Guardia, New York, regarded mathematics as the most powerful and manipulable abstract language available to humans. To acquaint students who don’t “like” math with abstract and systematical thinking, he put a piece of string in their hands and taught them to make string figures.