Comment on Equinunerous Sets

rain_worl@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

• yesman@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

  Sure, but does the set of all sets that don’t include themselves include itself?

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  • yetAnotherUser@discuss.tchncs.de ⁨2⁩ ⁨weeks⁩ ago

    Easy. If and only if the integer sequence A053169 contains itself.

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  • Enkers@sh.itjust.works ⁨2⁩ ⁨weeks⁩ ago

    Yesn’t.

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• match@pawb.social ⁨2⁩ ⁨weeks⁩ ago

  set a contains all horses. set b contains all ponysonas

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• very_well_lost@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

  But how can set b contain all of the horses if they’re already in set a???

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• steventhedev@lemmy.world ⁨2⁩ ⁨weeks⁩ ago

  Gotcha. So all horses are purple?

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