History
In the late 1970s, Yasuji Husimi and David A. Huffman independently discovered the special case of Kawasaki's theorem for crease patterns with four creases; Huffman called it the "critical π condition". The theorem for crease patterns with arbitrarily many creases was discovered by Kawasaki, by Stuart Robertson, and by Jacques Justin (again, independently of each other) in the late 1970s and early 1980s. Because of Justin's contribution to the problem, it has also been called the Kawasaki–Justin theorem.
Kawasaki himself has called the result Husimi's theorem, after Yasuji Husimi, and some other authors have followed this terminology as well. The name "Kawasaki's theorem" was first given to this result in Origami for the Connoisseur by Kunihiko Kasahara and Toshie Takahama (Japan Publications, 1987).
Hull (2003) credits the lower bound of 2n on the number of different flat-foldings of a crease pattern meeting the conditions of the theorem to independent work in the early 1990s by Azuma, Justin, and Ewins and Hull.
Read more about this topic: Kawasaki's Theorem
Famous quotes containing the word history:
“Well, for us, in history where goodness is a rare pearl, he who was good almost takes precedence over he who was great.”
—Victor Hugo (1802–1885)
“One classic American landscape haunts all of American literature. It is a picture of Eden, perceived at the instant of history when corruption has just begun to set in. The serpent has shown his scaly head in the undergrowth. The apple gleams on the tree. The old drama of the Fall is ready to start all over again.”
—Jonathan Raban (b. 1942)
“It’s not the sentiments of men which make history but their actions.”
—Norman Mailer (b. 1923)