二次型 Quadratic form

（重定向自Integral quadratic form）

在数学中，二次型是一些变量上的二次齐次多项式。例如

4x^2 + 2xy - 3y^2

是关于变量x和y的二次型。

二次型在许多数学分支，包括数论、线性代数、群论(正交群)、微分几何(黎曼测度)、微分拓扑(intersection forms of four-manifolds)和李代数(基灵型)中，占有核心地位。

单词	Integral quadratic form
释义	Integral quadratic form 中文百科二次型 Quadratic form （重定向自Integral quadratic form）在数学中，二次型是一些变量上的二次齐次多项式。例如 $4x^2 + 2xy - 3y^2$ 是关于变量x和y的二次型。二次型在许多数学分支，包括数论、线性代数、群论(正交群)、微分几何(黎曼测度)、微分拓扑(intersection forms of four-manifolds)和李代数(基灵型)中，占有核心地位。英语百科 Quadratic form 二次型（重定向自Integral quadratic form） In mathematics, a quadratic form is a homogeneous polynomial of degree two in a number of variables. For example, is a quadratic form in the variables x and y. Quadratic forms occupy a central place in various branches of mathematics, including number theory, linear algebra, group theory (orthogonal group), differential geometry (Riemannian metric), differential topology (intersection forms of four-manifolds), and Lie theory (the Killing form).
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Integral quadratic form

二次型 Quadratic form

Quadratic form 二次型