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Given  quantities  ,  , …,  , the Gaussian bracket  is defined as the sum of all following terms: - the product  , - all products that omit any pair of terms with consecutive indices, - all products that omit any two pairs of terms, each with consecutive indices, - all products that omit any three pairs of terms, each with consecutive indices, - and so forth, where the empty product has the value 1 if  is even. |
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