how to get the backshift operator property what's the function of back shift operator? backshift operator definition math ds what is the backshift operator what is the math term backshift operator define mathbf operator define: a backshift operator what is backshift operator what is the backshift operator backshift operator definition excel what is the property of backshift operator what is the backshift operator in math what is the back shift operator and how does it work what is the backshift operator what is the backshift operator in math backshift operator definition what is the backshift operator used for backshift operator value backshift operator definition which operator is used to make a random step