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CBSE Class 11-science Answered

What is Russell's paradox?

Asked by | 05 May, 2013, 09:43: AM

Expert Answer

Russell's paradox is the most famous of the logical or set-theoretical paradoxes. The paradox arises within naive set theory by considering the set of all sets that are not members of themselves. Such a set appears to be a member of itself if and only if it is not a member of itself, hence the paradox.

Let be the set of all sets which are not members of themselves. Then is neither a member of itself nor not a member of itself. Symbolically, let . Then iff .

Answered by | 05 May, 2013, 03:30: PM

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