Prof Emeritus Spelman College, Adjunct Prof SETU, Ireland. Board Gathering 4 Gardner. Curator Annals of Irish Maths. Author "Mathematical Card Magic" AKP/CRC Press
Schallamach waves, so says Michel Destrade at the University of Galway.
something is covered in plastic film and you move your finger across it, and in so doing sp the movement leaves behind a contrail of wrinkled lunes: what’s known at present about this process?
