semigroup
noun
semi·group
ˈse-mē-ˌgrüp 
ˈse-ˌmī-,
-mi-
: a mathematical set that is closed under an associative binary operation
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“Semigroup.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/semigroup. Accessed 29 Nov. 2025.
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