In Assignment 2 Q1.(c), it says the following:
Interchange the two equations and solve the system in three-decimal-digits floating-point arithmetic using LU factorization without pivoting and b/f/s.
Does it mean “without pivoting” but “with b/f/s”?
Or “without pivoting” and “without b/f/s”?
Thanks!
I see your point.
I meant using “LU factorization without pivoting” followed by “f/b/s”.
What does it mean exactly by “Interchange the two equations”? Which two equations is this referring to?
The system is Ax = b, and it has two equations.
Does that mean we swap the rows ?
So the first row is now 0.04x_1+8x_2=24 and the second row is 3x_1+7x_2=1 and solve for x_1, x_2 using LU
Yes, swap the rows/equations and solve using LU without pivoting,
then use f/b/s.