Hsien-Chung Wu is a Professor in the Department of Mathematics at the National Kaohsiung Normal University in Taiwan. He received his Ph.D from the University of Texas at Austin in USA. He is the sole author of more than 130 scientific papers published in international journals. He is an Associate Editor of Soft Computing, an Associate Editor of Fuzzy Optimization and Decision Making, and an Area Editor of International Journal of Uncertainty, Fuzziness and Knowledge-Based Systems. His current research includes the foundation of fuzzy sets and nonlinear analysis.