Difference between revisions of "Kanovei's question"
From Peano's Parlour
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| − | Is there a Borel model $M\models PA$ | + | Is there a Borel model $M\models PA$ whose standard system is the power set of $\omega$? |
Revision as of 04:52, 20 January 2013
Is there a Borel model $M\models PA$ whose standard system is the power set of $\omega$?
Woodin's question
If $\mathcal X$ is a Borel Scott set, is there a Borel model $M\models PA$ whose standard system is $\mathcal X$?
