[線代] row space跟null space
1. usually, there are two ways to describe a subspace
(1) a set of vectors that span the space
(2) a list of constraints that impose a subspace => N(A)
請問(2)是什麼意思呢? 有沒有例子是比較好懂的?
2. [1 0 1 0] [1 0 1 0]
A=[2 3 4 1] 列運算到 U=[0 1 2/3 1/3]
[4 3 6 1] [0 0 0 0]
[1] [ 0]
row space的basis => { [0] , [ 1] }
[1] [2/3]
[0] [1/3]
我這邊的問題是在 為什麼basis要寫直的? (因為今天老師上課強調要寫直的)
可是某補習班的黃x嘉書裡 他的basis是寫衡的
請問應該要寫直的還是寫衡的?
謝謝
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