单词	quadratic field
释义	quadratic field Any field of the form ℚ[√d] where d is a square-free integer and d ≠ 0,1. The elements of ℚ[√d] have the form q1 + q2√d, where q1,q2 are rational. ℚ[√d] is a degree 2 field extension over ℚ. Its ring of integers consists of those elements ζ∊ℚ[√d] that satisfy a quadratic equation ζ2 + aζ + b = 0, where a,b are integers. When d = −19, the ring of integers is ℤ[(1 + )/2], which is a principal ideal domain which is not a Euclidean domain.
随便看	Cauchy's mean value theorem Cauchy's Residue Theorem Cauchy's test Cauchy's Theorem Cauchy's Theorem Cauchy–Riemann equations Cauchy–Schwarz inequality Cauchy–Schwarz inequality for integrals Cauchy–Schwarz inequality for sums causation Cavalieri, Bonaventura Cayley, Arthur Cayley Representation Theorem Cayley's Theorem Cayley table Cayley–Hamilton Theorem cdf ceiling Celsius centesimal centi- centile central angle central conic central difference

数学辞典收录了4151条数学词条，基本涵盖了常用数学知识及数学英语单词词组的翻译及用法，是数学学习的有利工具。