Archive:: International Journal of Management and Fuzzy Systems:: Science Publishing Group

Volume 5, Issue 2, June 2019

Optimization of Portfolio Stock Selection with Meta Goal Programming

Eka Swastika Alwi Putri, Habibis Saleh, Moh Danil Hendry Gamal

Issue: Volume 5, Issue 2, June 2019

Pages: 33-39

Received: 31 May 2019

Accepted: 11 July 2019

Published: 30 July 2019

DOI: 10.11648/j.ijmfs.20190502.11

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Abstract: This article discusses the optimization of portfolio stock selection using the Meta Goal Programming (MGP) model. The optimization problem of stock portfolio selection with the MGP model is solved by combining the weight of trust in each type of MGP and comparing it with the Goal Programming (GP) portfolio. The ﬁnal result is in the form of the sel... Show More

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Algebraic Modification of Trapezoidal Fuzzy Numbers to Complete Fully Fuzzy Linear Equations System Using Gauss-Jacobi Method

Ahmad Syaiful Abidin, Mashadi Mashadi, Sri Gemawati

Issue: Volume 5, Issue 2, June 2019

Pages: 40-46

Received: 20 July 2019

Accepted: 19 August 2019

Published: 2 September 2019

DOI: 10.11648/j.ijmfs.20190502.12

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Abstract: This paper will discuss algebraic modification of trapezoidal fuzzy numbers with a general form of fully fuzzy numbers is with is n × n fuzzy matrix, fuzzy vector, and unknown fuzzy vector. The concept used in this paper is define positive or negative fuzzy numbers determined by the area on the left side of the x-axis and the right side of the x-axis. Furthermore, the concept will be applied to the multiplication of two fully fuzzy trapezoidal numbers to produce a new algebra that can be applied to a system of linear equations. At the end, an example of multiplication two fully fuzzy trapezoidal numbers using the Gauss-Jacobi method will be given. As a result compatible number will be obtained.

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