Is there any example of objects which were thought to exist infinitely but later proved to be finite?
I feel like this question was already asked, but I couldn't find the exact duplicate.
My research:
Are there theorems about mathematical objects that are later shown to be nonexistent?: This question is similar to mine, and it offers a great answer, but still does not answer my question exactly.
What are some actually finite sequences that long thought to be infinite?(on Reddit) : It indeed answers my question, but I would like more examples, not just about sequences.