This book mainly introduces some techniques of decision-making,
uncertain reasoning and regression analysis under the hesitant fuzzy
environment and expands the applications of hesitant fuzzy sets in
solving practical problems. The book pursues three major objectives: (1)
to introduce some techniques about decision-making, uncertain reasoning
and regression analysis under the hesitant fuzzy environment, (2) to
prove these techniques theoretically and (3) to apply the involved
techniques to practical problems. The book is especially valuable for
readers to understand how hesitant fuzzy set could be employed in
decision-making, uncertain reasoning and regression analysis and
motivates researchers to expand more application fields of hesitant
fuzzy set.