Matrix Division on the 28C/S (and later)

[Albert Chan]

A rule of thumb for LU decomposition method, "Numerical Methods in Engineering" by Salvadori and Baron, 1952, page 29

Quote:The number of figures lost in the computations varies from system to system, but statistically is of the order 0.3n.
Thus a system of 10 equations should be solved carrying 3 more significant figures than those required in the roots

The book is old, and above might not hold now. Example, this is particularly funny

Quote:A system of 10 equations can easily be solved in approximately 10 hours.