List of Articles Open Access Article Abstract Page Full-Text 1 - A Computational Method for Solving Optimal Control Problem of Time-varying Singular Systems Using the Haar Wavelets T. Shojaeizadeh E. Babolian Open Access Article Abstract Page Full-Text 2 - Improving the Accuracy of the Solutions of Riccati Equations A. R. Vahidi M. Didgar Open Access Article Abstract Page Full-Text 3 - Solving Fuzzy Integral Equations of the Second Kind by Fuzzy Laplace Transform Method S. Salahshour M. Khezerloo S. Hajighasemi M. Khorasany Open Access Article Abstract Page Full-Text 4 - Two-stage Malmquist Productivity Index with Intermediate Products M. A. Jahantighi Z. Moghaddas M. Vaez Ghasemi Open Access Article Abstract Page Full-Text 5 - A Method to Estimate the Solution of a Weakly Singular Non-linear Integro-differential Equations by Applying the Homotopy Methods Sh. Sadigh Behzadi A. Yildirim Open Access Article Abstract Page Full-Text 6 - Approximate Analytical Solutions of Fuzzy Linear Fredholm Integral Equations by HAM M. Ganbari