giai thừa

== Vietnamese == === Etymology === Sino-Vietnamese word from 階乘. The more common reading thừa is used instead of thặng. Compare Mandarin 階乘 / 阶乘 (jiēchéng), Cantonese 階乘 / 阶乘 (gaai1 sing4), Japanese 階乗 (kaijō), Korean 계승 (gyeseung). === Pronunciation === (Hà Nội) IPA(key): [zaːj˧˧ tʰɨə˨˩] (Huế) IPA(key): [jaːj˧˧ tʰɨə˦˩] (Saigon) IPA(key): [jaːj˧˧ tʰɨə˨˩] === Noun === giai thừa (combinatorics) a factorial