Variations on a theme.

نویسنده

  • D O'Brien
چکیده

A ring satisfying x = x is necessarily commutative. We consider a variety of weaker forms of this condition and show that many but not all of them imply commutativity. We also present a variety of elementary proofs of the fact that x = x implies commutativity.

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عنوان ژورنال:
  • Journal of perianesthesia nursing : official journal of the American Society of PeriAnesthesia Nurses

دوره 15 2  شماره 

صفحات  -

تاریخ انتشار 2000