にじたい
二次体
1. quadratic fieldMathematics
2. Quadratic fieldIn algebraic number theory, a quadratic field is an algebraic number field K of degree two over Q. It is easy to show that the map d ↦ Q(√d) is a bijection from the set of all square-free integers d ≠ 0, 1 to the set of all quadratic fields. If d > 0 the corresponding quadratic field is called a real quadratic field, and for d < 0 an imaginary quadratic field or complex quadratic field, corresponding to whether its archimedean embeddings are real or complex.
Read “Quadratic field” on English Wikipedia
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Read “Quadratic field” on DBpedia
Read “Quadratic field” on English Wikipedia
Read “二次体” on Japanese Wikipedia
Read “Quadratic field” on DBpedia
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