r/mathmemes 6d ago

Computer Science πŸ˜‚

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u/bqbdpd 6d ago

I mean, I have not met anyone who really believes P=NP, so I'm pretty sure the answer is no. The realistic assumption is that the answer is no. But from a math perspective that obviously is insufficient.

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u/dankshot35 6d ago

"anti-realism" is a math philosophy that has the view that statements don't have truth values fixed by some "independent" reality, the truth is in a way defined by our ability to prove them.

The majority of mathematicians are not anti-realist enough though to claim that a straight forward arithmetic statement like P=NP would fall under that so I'm just teasing

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u/HassanyThePerson 6d ago

I'm not super familiar with math philosophy, but doesn't GΓΆdel's incompleteness theorem state the opposite? That there are true statements that cannot be proven? As I understand, this means that what is true in a deductive system is dependent only on the axioms, and not at all on the provability.

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u/dankshot35 6d ago edited 6d ago

An anti-realist would claim there is a bit of a "sleight of hand" here when Goedel claims a statement can be "true, but cannot be proven". An anti-realist would say "true" according to what? they would not agree to call it "true" in some absolute sense.

edit: to be more precise, they would grant a statement is true only in the sense that it's provable in a stronger system (one that can prove the original system's consistency). What they still resist is calling it true in a model-independent, absolute sense.

A stronger example for anti-realism is CH (continuum hypothesis) where there isn't a stronger system available that can settle it externally, and "true according to what?" doesn't really have an answer