I considered deleting the post, but this seems more cowardly than just admitting I was wrong. But TIL something!

  • ferralcat@monyet.cc
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    10 months ago

    An infinite number of bills would mean there’s no space to move or breathe in, right? We’d all suffocate or be crushed under the pressure?

    • Natanael@slrpnk.net
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      10 months ago

      Depends on implementation.

      There’s a hierarchy called cardinality, and any two infinitives that can be cleanly mapped 1:1 are considered equal even if one “looks” bigger, like in the example from OP where you can map 100x 1 dollar bills to each 100 dollar bill into infinity and not encounter any “unmappable” units, etc.

      So filling an infinite 3D volume with paper bills is practically equivalent to filling a line within the volume, because you can map an infinite line onto a growing spiral or cube where you keep adding more units to fill one surface. If you OTOH assumed bills with zero thickness you can have some fun with cardinalities and have different sized of infinities!

    • ferralcat@monyet.cc
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      10 months ago

      I guess you’d need infinite space for an infinite number of bills. But it’d still be full to the brim?