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| | Steiner system -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-10-08) |
 | | In (A science (or group of related sciences) dealing with the logic of quantity and shape and arrangement) mathematics, a Steiner system is a type of (Click link for more info and facts about block design) block design. |
 | | If S is a Steiner triple system, we can define a multiplication on it by setting aa = a for all a in S, and ab = c if is a triple. |
 | | It is known that this is the only restriction on Steiner triple systems, that is, for each (The number 1 and any other number obtained by adding 1 to it repeatedly) natural number k, S(2,3,6k+1) and S(2,3,6k+3) systems exist. |
| www.absoluteastronomy.com /encyclopedia/s/st/steiner_system.htm (468 words) |
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