Sources page biographical material

6.U. TILING
6.U.1. PENROSE PIECES
R. Penrose. The role of aesthetics in pure and applied mathematical research. Bull. Inst. Math. Appl. 10 (1974) 266 272.

M. Gardner. SA (Jan 1977). Extensively rewritten as Penrose Tiles, Chaps. 1 & 2.

R. Penrose. Pentaplexity. Eureka 39 (1978) 16 22. = Math. Intell. 2 (1979) 32 37.

D. Shechtman, I. Blech, D. Gratias & J. W. Cohn. Metallic phase with long range orientational order and no translational symmetry. Physical Rev. Letters 53:20 (12 Nov 1984) 1951 1953. Describes discovery of 'quasicrystals' having the symmetry of a Penrose like tiling with icosahedra.

David R. Nelson. Quasicrystals. SA 255:2 (Aug 1986) 32 41 & 112. Exposits the discovery of quasicrystals. First form is now called 'Shechtmanite'.

Kimberly-Clark Corporation has taken out two patents on the use of the Penrose pattern for quilted toilet paper as the non-repetition prevents the tissue from 'nesting' on the roll. In Apr 1997, Penrose issued a writ against Kimberly Clark Ltd. asserting his copyright on the pattern and demanding damages, etc.

John Kay. Top prof goes potty at loo roll 'rip-off'. The Sun (11 Apr 1997) 7.

Patrick McGowan. It could end in tears as maths boffin sues Kleenex over design. The Evening Standard (11 Apr 1997) 5.

Kleenex art that ended in tears. The Independent (12 Apr 1997) 2.

For a knight on the tiles. Independent on Sunday (13 Apr 1997) 24. Says they exclusively reported Penrose's discovery of the toilet paper on sale in Dec 1996.

D. Trull. Toilet paper plagiarism. Parascope, 1997 -- available on www.noveltynet.org/content/paranormal/www.parascope.com/arti...