Moch Panji Agung Saputra Department of Mathematics, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang, Indonesia
Riza Andrian Ibrahim Doctoral Mathematics Study Programme, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran, Sumedang, Indonesia Indonesia
Renda Sandi Saputra Department of Informatics, Faculty of Technology and Information, University of Informatics and Business, Bandung, Indonesia Indonesia