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1.Let A be m*n matrix with m>n and b be an m*1 vector then Ax=b may have multiple solution t 2.I+AA is invertible 3.A,B is positive definite,then so is A+B -- ◤ ◥◤ ◥◤ ◥◤ ◥ Σ ◆ ◆ Σ ◆ ◆ Σ ◆ ◆ Σ ◆ ◆ ++++++ ++++++ ++++++++++++◥▇▆@ @▆▇◤ Ψ Ψ ▄▄▄ ▄▄▄ / \ ΓVISS -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 118.168.202.75
assassin88:FTF 02/24 19:03
crazyjoe:FFT 02/24 19:11
pimday1125:TTF 02/24 19:15
lightergogo:FTF 02/24 19:15
harry5438:T F T 02/24 19:28
polomoss:哈哈,每個人都不一樣,我覺得是TTT 02/24 19:34
pimday1125:有題目來源嗎 02/24 20:32
luckysky1:TTT 02/24 20:44
assassin88:更改 應該是FTT..XD 02/24 21:06
assassin88:下面有人回了..好囧 02/24 21:06
luckysky1:may讓人感覺是存在 02/24 21:08
polomoss:我還是覺得may只要存在就好~~問題就出在這個字 02/24 22:30
polomoss:如果用must就錯 02/24 22:30