"Kûn (sò͘-ha̍k)" pán-pún chi-kan bô-kāng--ê tē-hng

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Tē 1 chōa:
'''Kûn''' ([[Eng-gí]]: group) chāi [[sò͘-ha̍k]] tiong sī chi̍t khoán [[tài-sò͘ kò͘kiat-chōkò͘]] (algebraic structure), iā chiū sī chi̍t-ê kap [[sǹg-hoat]] (operation) kiat-ha̍p ê [[chi̍p-ha̍p]] (set). Chia ê sǹg-hoat ē koat-tēng jīn-hô chi̍p-ha̍p tiong ê seng-goân kap lēng-gōa chi̍t-ê goân-sò͘ (element) ē sán-seng án-choáⁿ khoán ê tē saⁿ ê goân-sò͘ (element).
 
Pí-lūn kóng, chi̍t-ê "kòa [[ka-hoat]] (chi̍t khoán sǹg-hoat) ê [[chéng-sò͘]] cho͘-sêng ê chip-ha̍p", chiū sī chi̍t-ê kûn. Chit-ê kûn tiong jīn-hô nn̄g-ê goân-sò͘ (iā chiū sī jīn-hô chéng-sò͘) ê siū ka-hoat sǹg chhut lēng-gōa ê chéng-sò͘.