|{\rm Re}~z|\leq |z|
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Recent Referers:
  1. http://formula.s21g.com/?%7C%7B%5Crm%20Re%7D~z%7C%5Cleq%2...
  2. https://mkprob.hatenablog.com/entry/20130510/1368163164
  3. https://mkprob.hatenablog.com/
  4. http://formula.s21g.com/
  5. http://d.hatena.ne.jp/mkprob/?of=0