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On the other hand , the functions , , and are not holomorphic anywhere on the complex plane , as can be shown by their failure to satisfy the Cauchy–Riemann conditions ( see below ) .
 Cauchy–Riemann
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Cauchy–Riemann