Linear Algebra, Spreadsheets.
2 unchanged) in A3. In terms of matrix multiplications, this is equivalent to assigning a value of -1 to element at row 3 and column 2 of matrix M3, calculating M3⋅A2 and storing the result in U. The outcome is shown in the figure below. Fig 4. Step 3 of the LU method. The L Step As obvious in this