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(Why must this x have infinitely many elements?)
Because since {y} \in S -> {{y}} \in S
Zekun’s 2024 Year in Books
Take a look at Zekun’s Year in Books, including some fun facts about their reading.
177 books
|
75 friends
2 books
|
42 friends
3 books
|
179 friends
0 books
|
20 friends
69 books
|
171 friends
19 books
|
49 friends
86 books
|
30 friends
89 books
|
56 friends
More friends…
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