X^2=1\quad {\rm a.s.}
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Recent Referers:
  1. http://formula.s21g.com/?X%5E2%3D1%5Cquad%20%7B%5Crm%20a....
  2. http://formula.s21g.com/
  3. http://d.hatena.ne.jp/mkprob/20120628
  4. http://d.hatena.ne.jp/mkprob/searchdiary?word=%2A%5BKarat...
  5. http://mkprob.hatenablog.com/?page=1343480443