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on 11/18/2024, WM supposed :It has one element less, hence the "size" ℵo is a very unsharp measure.On 18.11.2024 18:15, FromTheRafters wrote:But you do have now a proper subset of the naturals the same size as before.WM brought next idea :>>>|ℕ| - |ℕ| = 0 because if you subtract one element from ℕ then you haveno longer ℕ and therefore no longer |ℕ| describing it.
Still wrong.
If you remove one element from ℕ, then you have still ℵo but no longer all elements of ℕ.
Subtracting an element is defined. |ℕ| - 1 is defined as the number of elements minus 1.If |ℕ| describes the number of elements, then it has changed to |ℕ| - 1.Minus one is not defined.
The set of prime numbers is smaller.If you don't like |ℕ| then call this number the number of natural numbers.Why would I do that when it is the *SIZE* of the smallest infinite set.
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