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 _    _      ___      ______     ___      _  __  
| \  / ||   / _ \\   /_   _//   / _ \\   | |/ // 
|  \/  ||  | / \ ||    | ||    / //\ \\  | ' //  
| .  . ||  | \_/ ||   _| ||   |  ___  || | . \\  
|_|\/|_||   \___//   /__//    |_||  |_|| |_|\_\\ 
`-`  `-`    `---`    `--`     `-`   `-`  `-` --`

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Text this: For multi-interval-valued fuzzy sets, centroid defuzzification is equivalent to defuzzifying its interval hull: A theorem