\(\Pi_ 2^ 1\)-logic and uniformization in the analytical hierarchy (Q1262857)
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scientific article; zbMATH DE number 4125391
| Language | Label | Description | Also known as |
|---|---|---|---|
| English | \(\Pi_ 2^ 1\)-logic and uniformization in the analytical hierarchy |
scientific article; zbMATH DE number 4125391 |
Statements
\(\Pi_ 2^ 1\)-logic and uniformization in the analytical hierarchy (English)
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1989
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A simple (and illuminating) proof of \(\Pi^ 1_ i\) \((i=1,2)\) uniformization results is offered on the basis of \(\Pi^ 1_ 2\)-logic.
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uniformization
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\(\Pi^ 1_ 2\)-logic
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0.8717822
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0.87171024
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0.86384374
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0.85368156
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