[Solved] 18.06 Exercise 4-Factorization into A = LU

factorization into A = LU

Problem 4.1: What matrix E puts A into triangular form EA = U? Multiply by E¹ = L to factor A into LU.

A

Problem 4.2: (2.6 #13. Introduction to Linear Algebra: Strang) Compute L

Find four conditions on a, b, c, d to get A = LU with four pivots.