Linear Algebra, Spreadsheets.
A=inv(M1)⋅inv(M2)⋅inv(M3)⋅U or L=inv(M1)⋅inv(M2)⋅inv(M3) Given that matrices M are very simple (i.e. only one non-zero off-diagonal element), their inverses are also simple. Specifically, if j and i are the row and column of the non-zero off diagonal element and mⱼᵢ is the associated value, the