Wild 'Sets'

10182010, 03:25 PM
(This post was last modified: 10182010 04:08 PM by elim.)
Post: #1




Wild 'Sets'
(1) $\beta=\{x \mid x \; \text{contains at least 10 elements}\}\;$ ($\beta \in \beta$)
(2) $ b = \{x \mid x \notin x\} $ (1902 Russell $b \in b \Leftrightarrow b \notin b$) 

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