Resurrection shuffle
Article Abstract:
A deck of cards arranged such that the first card in the bottom half of the original decks ends up on top would assume its original order by performing the in-shuffle technique several times. A card shuffled in such manner tends to take the place of another until it reaches its original sequence.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 1998
User Contributions:
Comment about this article or add new information about this topic:
A bundling fool beats the wrap
Article Abstract:
A bundle of objects wrapped in film is less likely to collapse if the total volume of the pack, including the objects and air spaces, is as small as possible. The pack's volume also should still be convex. Mathematical equations are provided.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 1993
User Contributions:
Comment about this article or add new information about this topic:
Knotting ventured...
Article Abstract:
Knots can be used by topologists to study the mathematical principals of symmetry. Examples of knots which show examples of rotational symmetry, diagonal flip, rotation, central inversion and reversed symmetry are discussed.
Publication Name: Scientific American
Subject: Science and technology
ISSN: 0036-8733
Year: 2000
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Second sight. Tenderfoot at the track. The Third World of cars
- Abstracts: Nature on-line. A naturalist's guide to the Web. Nature on line: a naturalist's guide to the web
- Abstracts: Out of site. Needles in a cold war haystack. Reengineering the radio
- Abstracts: The great migration: why African-Americans moved out of the South. The geography of death
- Abstracts: Taken to heart: brushing your teeth may be good for your ticker. The business of the human genome