God's Number is 20
With about 35 CPU-years of idle computer time donated by Google, a team of researchers has essentially solved every position of the Rubik's Cube™, and shown that no position requires more than twenty moves.
Every solver of the Cube uses an algorithm, which is a sequence of steps for solving the Cube. One algorithm might use a sequence of moves to solve the top face, then another sequence of moves to position the middle edges, and so on. There are many different algorithms, varying in complexity and number of moves required, but those that can be memorized by a mortal typically require more than forty moves.
One may suppose God would use a much more efficient algorithm, one that always uses the shortest sequence of moves; this is known as God's Algorithm. The number of moves this algorithm would take in the worst case is called God's Number. At long last, God's Number has been shown to be 20.
It took fifteen years after the introduction of the Cube to find the first position that provably requires twenty moves to solve; it is appropriate that fifteen years after that, we prove that twenty moves suffice for all positions.
Lees verder: http://cube20.org
God's number is 20
Geplaatst op 12 augustus 2010 - 12:42
Give a man a fire and he's warm for a day. Set a man on fire and he's warm for the rest of his life.
Dit forum kan gratis blijven vanwege banners als deze. Door te registeren zal de onderstaande banner overigens verdwijnen.
0 gebruiker(s) lezen dit onderwerp
0 leden, 0 bezoekers, 0 anonieme gebruikers
Ook adverteren op onze website? Lees hier meer!
- Hier ook uw vacature? 06-14
- min. wanddikte pijp onder vacuum 24-02 1
- Cl volgens mohr in grond, kan... 24-02 1
- Ijzerbepaling in Ferro fumaraat 24-02 2
- NIR apparaat 24-02 1
- Neerslag in NaOH oplossing me... 24-02 3
- U/mL 24-02 2
- hoeveel hectare eikenbos? 23-02 1
- Help constructie berekening 23-02 1
- Arcsin van de sin van 3 is ni... 23-02 16
- Snelheid van een trillende massa 23-02 8