- Traditional Chinese Character(HanT):
恆等式
- Simplified Chinese Character(HanS):
恒等式
- Bopomofo(Mandarin Phonetic Symbols): ㄏㄥˊ ㄉㄥˇ ㄕˋ (ㄏㄉㄕ)
- Bopomofo(Zhuyin Keyboard Input/IME): c/62/3g4
- (ASCII) Hanyu Pinyin: "hengdengshi" "Heng2Deng3Shi4" "Heng2 Deng3 Shi4" (HDS)
- (Latin) Hànyǔ Pīnyīn: HéngDěngShì [ Héng Děng Shì ]
- (英文翻譯) English Translation: "Identity"
- (西語翻譯) Traducción Español: "Identidad"
- (日文翻譯) 日本語翻訳: "身元"