Tower of fields

In mathematics, a tower of fields is a sequence of field extensions

F0F1 ⊆ ... ⊆ Fn ⊆ ...

The name comes from such sequences often being written in the form

A tower of fields may be finite or infinite.


(i.e. Fn+1 is obtained from Fn by adjoining a 2nth root of 2) is an infinite tower.


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