When zero appears in a pivot position, A = LU is not possible! (We need nonzero pivots
Chapter 1, Problem 1.5.25(choose chapter or problem)
When zero appears in a pivot position, A = LU is not possible! (We need nonzero pivots d, f , i in U.) Show directly why these are both impossible: " 0 1 2 3# = " 1 0 ` 1 #"d e 0 f # 1 1 0 1 1 2 1 2 1 = 1 ` 1 m n 1 d e g f h i
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