F7 math: it's just like regular math except seven doesn't exist. no multiples of it exist. no numbers with 7 in them exist either, in both the sense of a multiple or a digit (47 doesn't exist, and neither does 49)
@noelle@sydneyfalk this would be the same cardinality as aleph 0, so there should be a bijective mapping between the two sets, thus you can sort of get the 7s back
@noelle@sydneyfalk though i suppose aleph 0 - (aleph 0 -7) probably also has the same cardinality as aleph 0... hmm cantor was so much better at this than i am.
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@noelle @sydneyfalk though i suppose aleph 0 - (aleph 0 -7) probably also has the same cardinality as aleph 0... hmm cantor was so much better at this than i am.