On One-to-One Numberings of the Family of All Σ21 -Sets

M. V. Dorzhieva

doi:10.1007/s10958-020-04781-6

On One-to-One Numberings of the Family of All Σ21 -Sets

M. V. Dorzhieva

Результат исследования: Научные публикации в периодических изданиях › статья › рецензирование

Аннотация

We prove that for the second level analytical hierarchy there are no a one-to-one Σ21-computable numbering of the family of all Σ21-sets.

Язык оригинала	английский
Страницы (с-по)	788–792
Число страниц	5
Журнал	Journal of Mathematical Sciences (United States)
Том	246
Номер выпуска	6
DOI	https://doi.org/10.1007/s10958-020-04781-6
Состояние	Опубликовано - 1 мая 2020

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10.1007/s10958-020-04781-6

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On One-to-One Numberings of the Family of All Σ21 -Sets

Аннотация

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