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A number field is a finite degree extension of the field of rational numbers \(\mathbb{Q}\). The class number of a number field is an important invariant that measures the failure of unique factorization in its ring of integers. A number field with class number one has unique factorization, which is a desirable property in algebraic number theory.

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  1. Field (mathematics)
  2. Abstract algebra
  3. Algebra
  4. Fields of mathematics
  5. Mathematics
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