Mathematics
1986-1987
Polyhedron model showing the icosahedron and one of its 58 stellations, by John L. Hudson, Nottingham, England, United Kingdom, 1986-1987
1996
Folded copper sheet mathematical model.
1872
Hyperbolic paraboloid; a skew quadrilateral turning upon four hinges with parallel axes or pins; the lengths of the strings remain unaltered during deformation.
Folded copper sheet mathematical model
