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  2. Light Up (puzzle) - Wikipedia

    en.wikipedia.org/wiki/Light_Up_(puzzle)

    A typical starting point in the solution of a Light Up puzzle is to find a black cell with a 4, or a cell with a smaller number that is blocked on one or more sides (for example, a 3 against a wall or a 2 in a corner) and therefore has only one configuration of surrounding bulbs. After this step, other numbered cells may be illuminated on one ...

  3. James K. Freericks - Wikipedia

    en.wikipedia.org/wiki/James_K._Freericks

    James K. Freericks (born 1963) is an American physicist and endowed chair at Georgetown University. He has worked in fields of condensed matter physics, mathematical physics, atomic physics, nonequilibrium physics, quantum computation, and quantum mechanics pedagogy.

  4. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  5. Water pouring puzzle - Wikipedia

    en.wikipedia.org/wiki/Water_pouring_puzzle

    By restricting ourselves to reversible actions only, we can construct the solution to the problem from the desired result. From the point [4,4,0], there are only two reversible actions: transferring 3 liters from the 8 liter jug to the empty 3 liter jug [1,4,3], and transferring 3 liters from the 5 liter jug to the empty 3 liter jug [4,1,3].

  6. Geodesic polyhedron - Wikipedia

    en.wikipedia.org/wiki/Geodesic_polyhedron

    Archived from the original on July 4, 2008. Reprinted by Dover (1999), ISBN 978-0-486-40921-4. Popko, Edward S. (2012). "Chapter 8. Subdivision schemas, 8.1 Geodesic Notation, 8.2 Triangulation number 8.3 Frequency and Harmonics 8.4 Grid Symmetry 8.5 Class I: Alternates and fords 8.5.1 Defining the Principal triangle 8.5.2 Edge Reference Points".

  7. Schelling's model of segregation - Wikipedia

    en.wikipedia.org/wiki/Schelling's_model_of...

    Schelling's model of segregation is an agent-based model developed by economist Thomas Schelling. [1] [2] Schelling's model does not include outside factors that place pressure on agents to segregate such as Jim Crow laws in the United States, but Schelling's work does demonstrate that having people with "mild" in-group preference towards their own group could still lead to a highly segregated ...

  8. Lattice multiplication - Wikipedia

    en.wikipedia.org/wiki/Lattice_multiplication

    A grid is drawn up, and each cell is split diagonally. The two multiplicands of the product to be calculated are written along the top and right side of the lattice, respectively, with one digit per column across the top for the first multiplicand (the number written left to right), and one digit per row down the right side for the second multiplicand (the number written top-down).

  9. Janko group J4 - Wikipedia

    en.wikipedia.org/wiki/Janko_group_J4

    Ivanov & Meierfrankenfeld (1999) and Ivanov (2004) gave a computer-free proof of existence by constructing it as an amalgams of groups 2 10:SL 5 (2) and (2 10:2 4:A 8):2 over a group 2 10:2 4:A 8. The Schur multiplier and the outer automorphism group are both trivial. Since 37 and 43 are not supersingular primes, J 4 cannot be a subquotient of ...