How to check that field is Number Field

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petRUShka
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Suppose I have field FF:

sage: FF
Number Field in z with defining polynomial t^2+1

How to programmatically check that this field is Number Field? Something like FF.is_number_field()...

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sage: NumberField(x^2 + 1, 'a') in NumberFields()
True

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Last updated: Jul 06 '21