Title Solving the Fractional Volterra Integro-Differential Equations by an Extremum Problem Type of Research Article Keywords Solving the Fractional Volterra Integro-Differential Equations by an Extremum Problem Abstract Solving the Fractional Volterra Integro-Differential Equations by an Extremum Problem Researchers Mohhamd Ali Mohebbi Ghandehari (First Researcher)، Mojtaba Ranjbar (Second Researcher)