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alpha -> Aleph Ever tried writing mathematical texts with a typewriter? The typewriter at school had type wheels for math symbols, greek letters, ... But not one with an aleph. And I had to write something about countable sets and sets which you can't count, ... When I handed my papers to the teacher he told me that he meant it more philosophical and not mathematical: You can count all fallen leaves on a day but not all broken hearts because the later is not well defined Some sets are more infinite than others and the aleph numbers are used to put them in groups. https://en.wikipedia.org/wiki/Aleph_number