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Linear Algebra

let p=A(ATA)-1AT,and A is an m×n matrix of rank n?

1- show that p2 = p?

2-show that p k= p for k=1,2,.......?

3- show that p is symmetric /[ hint ; if B is nonsingular, then (B-1)T=( BT)-1]?

Posted in Algebra, asked by khaled , 6 years ago. 1831 hits.
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