Journal of Physics: Conference Series PAPER • OPEN ACCESS Some properties on fuzzy chromatic number of union of fuzzy graphs through α-cut graphs coloring To cite this article: I Rosyida et al 2019 J. Phys.: Conf. Ser. 1306 012042 View the article online for updates and enhancements. This content was downloaded from IP address 107.173.135.2 on 11/09/2019 at 11:38