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1. Erkan Yılmaz (erkanyilmaz)'s status on Tuesday, 07-Jan-2014 20:28:07 EST Erkan Yılmaz

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   • Markov Dosto(y)evsky
   How about '#complex numbers have been defined by introducing i, the imaginary unit, as a #symbol' ? https://en.wikipedia.org/wiki/Complex_number#Formal_development