http://ultraman.livejournal.com/ ([identity profile] ultraman.livejournal.com) wrote in [personal profile] factitious 2006-04-26 02:16 pm (UTC)

'u' is not an element of 'U', though 'U' is a set, and 'u' is a member of some set.

also the version I have appears to be from a typewriter where the upper/lowercase distinction is harder to determine.
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