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  2. Sum: Forty Tales from the Afterlives - Wikipedia

    en.wikipedia.org/wiki/Sum:_Forty_Tales_from_the...

    Sum was chosen by Time magazine for their 2009 Summer Reading list, with the acclaim "Eagleman is a true original. Read Sum and be amazed. Reread Sum and be reamazed.". [11] Sum was selected as Book of the Week by both The Guardian [12] and The Week [13] and was the featured subject on the cover of two magazines in 2009, The Big Issue and ...

  3. Minkowski addition - Wikipedia

    en.wikipedia.org/wiki/Minkowski_addition

    Minkowski sums act linearly on the perimeter of two-dimensional convex bodies: the perimeter of the sum equals the sum of perimeters. Additionally, if K {\displaystyle K} is (the interior of) a curve of constant width , then the Minkowski sum of K {\displaystyle K} and of its 180 ∘ {\displaystyle 180^{\circ }} rotation is a disk.

  4. Combinatorial principles - Wikipedia

    en.wikipedia.org/wiki/Combinatorial_principles

    The rule of sum is an intuitive principle stating that if there are a possible outcomes for an event (or ways to do something) and b possible outcomes for another event (or ways to do another thing), and the two events cannot both occur (or the two things can't both be done), then there are a + b total possible outcomes for the events (or total possible ways to do one of the things).

  5. Kakuro - Wikipedia

    en.wikipedia.org/wiki/Kakuro

    An easy Kakuro puzzle Solution for the above puzzle. Kakuro or Kakkuro or Kakoro (Japanese: カックロ) is a kind of logic puzzle that is often referred to as a mathematical transliteration of the crossword. Kakuro puzzles are regular features in many math-and-logic puzzle publications across the world.

  6. Magic hexagon - Wikipedia

    en.wikipedia.org/wiki/Magic_hexagon

    It starts with 2, ends with 128 and its sum is 635. An order 8 magic hexagon was generated by Louis K. Hoelbling on February 5, 2006: It starts with −84 and ends with 84, and its sum is 0. An order 9 magic hexagon was found by Klaus Meffert on September 10, 2024 with help of an AI: It starts with -108 and ends with 108, and its sum is 0.

  7. Survo puzzle - Wikipedia

    en.wikipedia.org/wiki/Survo_Puzzle

    A Survo puzzle is a kind of logic puzzle presented (in April 2006) and studied by Seppo Mustonen. [1] The name of the puzzle is associated with Mustonen's Survo system , which is a general environment for statistical computing and related areas.

  8. List of NP-complete problems - Wikipedia

    en.wikipedia.org/wiki/List_of_NP-complete_problems

    Subset sum problem [3]: SP13 Variations on the Traveling salesman problem. The problem for graphs is NP-complete if the edge lengths are assumed integers. The problem for points on the plane is NP-complete with the discretized Euclidean metric and rectilinear metric.

  9. 1729 (number) - Wikipedia

    en.wikipedia.org/wiki/1729_(number)

    1729 is composite, meaning its factors are 1, 7, 13, 19, 91, 133, 247, and 1729. [1] It is the multiplication of its first three smallest prime numbers . [2] Relatedly, it is the third Carmichael number, [3] and specifically the first Chernick–Carmichael number.