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diff --git a/104/CH5/EX5.19/5_19.sce b/104/CH5/EX5.19/5_19.sce
new file mode 100755
index 000000000..2c18ebb8b
--- /dev/null
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+//controllability
+A=[-2 1;0 -1]
+B=[1;0]
+S=[B A*B]
+if det(S)==0 then
+ printf("system is uncontrollable")
+else
+ printf("system is contollable")
+ end \ No newline at end of file