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It is not the case that It is not necessary to conjure up the picture of the infinite (of the enormously big) in mathematical reasoning.
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Reasons For
2 perspectives
Reason for 1 of 2
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1.
Gödel's incompleteness theorems were discovered through reasoning about the totality of all provable sentences, an explicitly infinite domain.
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2.
Mathematical reasoning that produces genuine results via infinite pictures cannot be dismissed as mere psychological scaffolding without mathematical content.
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3.
Wittgenstein's finitist criterion for mathematical meaningfulness would, if applied consistently, eliminate large portions of classical number theory.
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Reason for 2 of 2
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1.
Cantor's transfinite arithmetic generates theorems (e.g., |ℕ| < |ℝ|) that are unintelligible without a picture of completed infinite totalities.
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2.
If a mathematical calculus generates results that require infinite structures for their interpretation, then pictures of the infinite are mathematically indispensable.
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Reasons Against
1 perspective
Reason against
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1.
The calculus contains nothing infinite.
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2.
Once we see that the calculus contains nothing infinite, there is no mathematical deficit that requires supplementation by a picture of the infinite.
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