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| rdfs | http://www.w3.org/2000/01/rdf-schema# |
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| dbpedia | http://dbpedia.org/resource/ |
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- dbpedia:Orthogonal_array
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In mathematics, in the area of combinatorial designs, an orthogonal array is a "table" (array) whose entries come from a fixed finite set of symbols (typically, {1,2,...,n}), arranged in such a way that there is an integer t so that for every selection of t columns of the table, all ordered t-tuples of the symbols, formed by taking the entries in each row restricted to these columns, appear the same number of times. The number t is called the strength of the orthogonal array.