Projective Measure Without Projective Baire

Friedman, Sy David; Schrittesser, David

ISBN 10: 1470442965 / ISBN 13: 9781470442965

Editore: Amer Mathematical Society, 2021

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Dati bibliografici

• Titolo: Projective Measure Without Projective Baire
• Editore: Amer Mathematical Society
• Data di pubblicazione: 2021
• Lingua: Inglese
• ISBN 10: 1470442965
• ISBN 13: 9781470442965
• Rilegatura: Brossura
• Condizione: As New

Descrizione articolo

Riassunto

The authors prove that it is consistent (relative to a Mahlo cardinal) that all projective sets of reals are Lebesgue measurable, but there is a $\Delta^1_3$ set without the Baire property. The complexity of the set which provides a counterexample to the Baire property is optimal.