JackieBurkhart
The years don't matter, the life in those years do
The sets A and B both contain infinitely many elements, but they have the same cardinality or number of elements.
To justify this, we can use the concept of one-to-one correspondence or bijection. Two sets have the same cardinality if we can establish a one-to-one correspondence between their elements.
In this case, we can establish a bijection between the elements of set A and the elements of set B by multiplying each element in A by 2. For example: 0 in A corresponds to 0 in B 1 in A corresponds to 2 in B 2 in A corresponds to 4 in B 3 in A corresponds to 6 in B and so on.
This mapping shows that every element in A can be paired with a unique element in B and vice versa. Therefore, A and B have the same number of elements, even though intuitively it might seem like A should have more elements since it includes all non-negative whole numbers. However, the concept of infinity in mathematics can be counterintuitive.
In set theory, we say that two sets have the same cardinality if there exists a bijection between them, regardless of any apparent differences in the nature or size of their elements. In this case, A and B have the same cardinality, so they have the same number of elements.
What does this even mean?
