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2. Origami paper - Wikipedia

   en.wikipedia.org/wiki/Origami_paper

   Origami paper and a traditional origami crane. Origami paper is the paper used for origami, the art of Japanese paper folding.The only real requirement of the folding medium is that it must be able to hold a crease, but should ideally also be thinner than regular paper for convenience when multiple folds over the same small paper area are required (e.g. such as would be the case if creating an ...

3. Kawasaki's theorem - Wikipedia

   en.wikipedia.org/wiki/Kawasaki's_theorem

   [10] [11] Huffman included the result in a 1976 paper on curved creases, [12] and Husimi published the four-crease theorem in a book on origami geometry with his wife Mitsue Husimi. [13] The same result was published even earlier, in a pair of papers from 1966 by S. Murata that also included the six-crease case and the general case of Maekawa's ...

4. Big-little-big lemma - Wikipedia

   en.wikipedia.org/wiki/Big-little-big_lemma

   In the mathematics of paper folding, the big-little-big lemma is a necessary condition for a crease pattern with specified mountain folds and valley folds to be able to be folded flat. [1] It differs from Kawasaki's theorem , which characterizes the flat-foldable crease patterns in which a mountain-valley assignment has not yet been made.

5. Huzita–Hatori axioms - Wikipedia

   en.wikipedia.org/wiki/Huzita–Hatori_axioms

   The Huzita–Justin axioms or Huzita–Hatori axioms are a set of rules related to the mathematical principles of origami, describing the operations that can be made when folding a piece of paper. The axioms assume that the operations are completed on a plane (i.e. a perfect piece of paper), and that all folds are linear. These are not a ...

6. Maekawa's theorem - Wikipedia

   en.wikipedia.org/wiki/Maekawa's_theorem

   Maekawa's theorem is a theorem in the mathematics of paper folding named after Jun Maekawa. It relates to flat-foldable origami crease patterns and states that at every vertex, the numbers of valley and mountain folds always differ by two in either direction. [1] The same result was also discovered by Jacques Justin [2] and, even earlier, by S ...

7. Origami - Wikipedia

   en.wikipedia.org/wiki/Origami

   Origami (折り紙, Japanese pronunciation: or [oɾiꜜɡami], from ori meaning "folding", and kami meaning "paper" (kami changes to gami due to rendaku)) is the Japanese art of paper folding. In modern usage, the word "origami" is often used as an inclusive term for all folding practices, regardless of their culture of origin.