🔸垂直向量

線性代數向量 ⟩ 垂直向量

  1. uv  and  uv    u=v=0\mathbf{u} \perp \mathbf{v} \ \text{ and } \ \mathbf{u} \parallel \mathbf{v} \iff \mathbf{u} = \mathbf{v} = \mathbf{0}

  1. 如果一組非零向量兩兩相互垂直,則它們必線性獨立

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