University of Tabriz Computational Methods for Differential Equations 2345-3982 9 1 2021 01 01 First order linear fuzzy differential equations with fuzzy variable coefficients 1 21 9939 10.22034/cmde.2020.34127.1568 EN Robab Alikhani Faculty of Mathematical science, University of Tabriz, Tabriz, Iran. Mahdi Mostafazadeh Faculty of Mathematical science, University of Tabriz, Tabriz, Iran. Journal Article 2019 06 24 In this study, we investigate the first order linear fuzzy differential equations with fuzzy variable coefficients. Appearance of the multiplication of a fuzzy variable coefficient by an unknown fuzzy function in linear differential equations persuades us to employ the concept of the cross product of fuzzy numbers. Mentioned product overcomes to some difficulties we face to in the case of the usual product obtained by Zadeh’s extension principle. Under the cross product, we obtain the explicit fuzzy solutions for a fuzzy initial value problem applying the concept of the strongly generalized differentiability. Finally, some examples are given to illustrate the theoretical results. The obtained numerical results are compared with other approaches in the literature for similar parameters. https://cmde.tabrizu.ac.ir/article_9939_5a4ede5c8703c2914d4cb588d3f27dff.pdf