PROCEDURE mtt_solve(VAR x : StateVector;
VAR A : StateMatrix;
VAR B : StateVector;
n : integer;
Small : real);
{
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VAR
i : integer;
wmax,wmin : real;
w : StateVector ;
v : StateMatrix;
(*$I svdcmp.p *)
(*$I svbksb.p *)
BEGIN{mtt_solve}
(* decompose matrix A using SVD *)
svdcmp(A,n,n,w,v);
(* find maximum singular value *)
wmax := 0.0;
FOR i := 1 to n DO BEGIN
IF (w[i] > wmax) THEN wmax := w[i]
END;
(* define "small" *)
wmin := wmax*Small;
(* zero the "small" singular values *)
FOR i := 1 to n DO BEGIN
IF (w[i] < wmin) THEN w[i] := 0.0
END;
(* backsubstitute for B *)
svbksb(A,w,v,n,n,B,x);
END{mtt_solve};