Description
This function uses the backward substitution method for solving the linear system Ax = b, where A is an upper triangular matrix b is a known vector and n is the dimension of the problem.
Example :
A = diag([2, -1, 3]) A = 2 0 0 0 -1 0 0 0 3 b = [4; 1; 3] b = 4 1 3
The code gives the final result :
x = 2 -1 1
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