3721
Inverse The inverse of the discrete Fourier transform is given as : where 1/n is the multiplicative inverse of n in R ( if this inverse does not exist , the DFT can not be inverted ) .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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