diff --git a/samples/sample_complete_liner_equation_system_resolve.m b/samples/sample_complete_liner_equation_system_resolve.m
index 734f338..b611846 100644
--- a/samples/sample_complete_liner_equation_system_resolve.m
+++ b/samples/sample_complete_liner_equation_system_resolve.m
@@ -7,5 +7,5 @@ U=[2,4,-2;1,-1,5;4,1,-2] % matrice di input
 b=[6;-3;-10] %termini noti
 
 [x,y] = convert_matrix_to_triangular_matrix_gauss_naif(U,b)
-[x1] = linear_system_resolver_triangular_matrix(x,y)
+[x1] = linear_system_resolver_upper_triangular_matrix(x,y)