[理工] 線代
The unipue least norm solution to Ax=b is the orthogonal projection
of b onto R(A).
(F):Ax=b 的 minimal solution 在R(A^T)中
1.least norm solution = minimal solution?
2.題目中orthogolan projection of b ontoR(A),會讓我想到
b
proj =A(A^TA)^-1A^Tb 跟minimal solution 的定理
R(A)
<1> s屬於R(A^T),st s is Ax=b 的 minimal solution
<2> u滿足(AA^T)u=b,then s=A^Tu
想不出其中的關聯性...
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