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Joined 3 years ago
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Cake day: June 17th, 2023

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  • Not sure honestly, I can think of alternatives but I don’t know if they’re better. “Isomorphism of sets” is a fancy way of saying “bijection”, and “unique set up to isomorphism” is the same as “unique cardinal” but as you say it’s better to use terms that everyone knows. It might just be that “unique” being right at the beginning makes it easy to forget. Decoding the description is a fun part of the problem!


  • I thought that as well for a while so I was waiting for someone to say that! My claim that A is exactly ℵ2 is based on it saying “unique”, meaning there’s only 1 cardinality with the property described, between ℵ0 and A (which must be ℵ1). But I agree the wording is not very clear. The version without uniqueness is still a dilemma, it just means that it’s also possible for A to be larger than B even if CH is false.


  • I’ll give this a go. The number of people at A is ℵ2 and at B is 2ℵ0. If the continuum hypothesis is true then there are ℵ1 people at B so A has more people, if it is false then either there are more at B or there could be equally many at A and B (if the star axiom is true).

    Either way infinitely many people are dying so it’s a sad story.












  • I realised I didn’t know what their demands are, but it’s in the article:

    The group’s demands include immediate bail, the right to a fair trial, the deproscription of Palestine Action, the shutdown of Israeli weapons firm Elbit Systems’ sites on British soil, and an end to alleged prison interference with their letters and other communications.

    Worth noting that they’re not asking for any charges to be dropped, so they would probably still face long prison sentences for criminal damage even if the government agreed to all of this