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diff --git a/29/CH11/EX11.37/exa11_37.sce b/29/CH11/EX11.37/exa11_37.sce
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+//caption:check_for_contrallability_of_system
+//example 11_37
+//page 512
+A=[1 1;0 -1]
+B=[1;0]
+P=cont_mat(A,B);
+disp(P,"Controllability Matrix=");
+d=determ(P)
+if d==0
+  printf("matrix is singular, so system is uncontrollable");
+else
+  printf("system is controllable");
+end;
+\ No newline at end of file