线性代数里,假若,内积空间的两个向量是互相正交的,并且,两个向量的范数都是 1 ,则称这两个向量互相具有正交规范性,又译单范正交性正交归一性。假若,一组向量全都是互相正交规范的,则称这组向量为正交规范集。假若,这正交规范集形成了一个,则称这集合为正交规范基

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