In collaboration with Payame Noor University and the Iranian Society of Instrumentation and Control Engineers
Control and Optimization
Analysis of Students' Mistakes in Solving Integrals to Minimize their Mistakes

Mohammad Darvisahzadeh; Ahmad Shahvarani Semnani; Hassan Alamolhodaei,; Hassan Behzadi

Volume 4, Issue 2 , January 2019, , Pages 49-60

https://doi.org/10.30473/coam.2020.55039.1148

Abstract
  Experiences of teaching Integral have indicated that the vast majorities of Iranian university students commit numerous errors while solving integral problems and have weak skills in this field; we might even say that they hide away from integral and consider it the nightmare of mathematics‎. ‎On ...  Read More

Control and Optimization
Weakly Perfect Graphs of Modules

Mostafa Nouri Jouybari; Yahya Talebi Rostami; Siyamak Firouzian

Volume 4, Issue 2 , January 2019, , Pages 61-67

https://doi.org/10.30473/coam.2021.55089.1149

Abstract
  In this study‎, ‎$R$ and $M$ are assumed to be a commutative ring with non-zero identity $M$ and an $R$-module‎, ‎respectively‎. ‎Scalar Product Graph of $M$‎, ‎denoted by $G_R(M)$‎, ‎is a graph with the vertex-set $M$ and two different vertices $a$ and $b$ in ...  Read More

Control and Optimization
Solving System of Nonlinear Equations by using a New Three-Step Method

Mehdi Ahmadi; Hamid Esmaeili; R Erfanifar

Volume 1, Issue 2 , October 2016, , Pages 53-62

Abstract
  In this paper‎, ‎we suggest a fifth order convergence three-step method for solving system of nonlinear equations‎. ‎Each iteration of the method requires two function evaluations‎, ‎two first Fr\'{e}chet derivative evaluations and two matrix inversions‎. ‎Hence‎, ...  Read More