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June 5th, 2009, 07:25 PM  #1 
Senior Member Joined: Nov 2007 Posts: 258 Thanks: 0  Every quadratic field is contained in a cyclotomic field
This is a well known theorem. In perticular, the mth quadratic field, for m squarefree, is contained in the dth cyclotomic field, where , the discriminant of the ring of algebraic integers in the mth quadratic field. Now my question is : is the dth cyclotomic field the cyclotomic field with least d containing the mth quadratic field? 

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contained, cyclotomic, field, quadratic 
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