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2. List of set identities and relations - Wikipedia

   en.wikipedia.org/wiki/List_of_set_identities_and...

   This article lists mathematical properties and laws of sets, involving the set-theoretic operations of union, intersection, and complementation and the relations of set equality and set inclusion. It also provides systematic procedures for evaluating expressions, and performing calculations, involving these operations and relations.

3. Mutually orthogonal Latin squares - Wikipedia

   en.wikipedia.org/wiki/Mutually_orthogonal_Latin...

   A Graeco-Latin square or Euler square or pair of orthogonal Latin squares of order n over two sets S and T (which may be the same), each consisting of n symbols, is an n × n arrangement of cells, each cell containing an ordered pair (s, t), where s is in S and t is in T, such that every row and every column contains each element of S and each element of T exactly once, and that no two cells ...

4. Algebra of sets - Wikipedia

   en.wikipedia.org/wiki/Algebra_of_sets

   The algebra of sets is the set-theoretic analogue of the algebra of numbers. Just as arithmetic addition and multiplication are associative and commutative, so are set union and intersection; just as the arithmetic relation "less than or equal" is reflexive, antisymmetric and transitive, so is the set relation of "subset".

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   Mistana Hillsby Performance Blue/Orange Rug, 7'10" x 10'3" $100 $450 Save $350. ... and this 10-piece set has that and more. It comes with not one, not two, but five cake pans in different shapes ...

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   In 2020 I redesigned my old 500-square-foot Brooklyn one-bedroom apartment into a stylish two-person live and work space on a budget. ... (set of 2) $14 $30 ... Damask Petals Braided Jute Area Rug ...

7. Union (set theory) - Wikipedia

   en.wikipedia.org/wiki/Union_(set_theory)

   For example, the union of three sets A, B, and C contains all elements of A, all elements of B, and all elements of C, and nothing else. Thus, x is an element of A ∪ B ∪ C if and only if x is in at least one of A, B, and C. A finite union is the union of a finite number of sets; the phrase does not imply that the union set is a finite set ...