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      1 # Cartesian Product
      2 
      3 Throughout textbook
      4 
      5 **Definition:** The Cartesian Product of two sets is the set of all ordered pairs a,b where a is contianed in A and b is contained in B. 
      6 
      7 This set has a size of |A| * |B|.
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      9 Cartesian products or cartesian sets, are denoted using x as in A x B. This is also how we describe the coordinate planes denoted as R^2 as it is the cartesian set of all real numbers and all real numbers.