関数

Japanese

Kanji in this term
関	数
かん Grade: 4	すう Grade: 2
on’yomi

Etymology

From Mandarin 函數 (hánshù, “mathematical function”), itself first used in print in 1859 in Li Shanlan's Chinese translation of Elias Loomis's Elements of Analytical Geometry and of the Differential and Integral Calculus.

The Japanese reading of kansū is based on the expected Japanese on'yomi of the constituent characters.

The 関数 spelling is a replacement for the older 函数 spelling, which was rendered obsolete when the 函 character was excluded during formulation of the Tōyō kanji list.

Pronunciation

• On’yomi
  • (Tokyo) かんす​う [kàńsúꜜù] (Nakadaka – [3])
  • IPA^(key): [kã̠ɰ̃sɨᵝː]

Alternative forms

• 函数 (historical, now uncommon)

Noun

関数 (shinjitai kanji, kyūjitai kanji 函數, hiragana かんすう, rōmaji kansū, historical hiragana くわんすう)

1. (mathematics, computing) function

Compounds

Derived terms

• 組 (く)み込 (こ)み関 (かん)数 (すう) (kumikomikansū): built-in function
• 逆関数 (ぎゃくかんすう) (gyakukansū): inverse function
• 正則関数 (せいそくかんすう) (seisokukansū): regular function, holomorphic function

• 不連続関数 (ふれんぞくかんすう) (furenzokukansū): discontinuous function
• 離 (り)散 (さん)関 (かん)数 (すう) (risankansū): discrete function
• 連続関数 (れんぞくかんすう) (renzokukansū): continuous function

Synonyms

(computing):

• プロシージャ (puroshīja): a procedure
• ファンクション (fankushon): a function
• メソッド (mesoddo): a method
• ルーチン (rūchin): a routine

See also

• プロジェクト:数学/函数と関数 on the Japanese Wikipedia.Wikipedia ^ja

References

• 2002, Ineko Kondō; Fumi Takano; Mary E Althaus; et. al., Shogakukan Progressive Japanese-English Dictionary, Third Edition, Tokyo: Shōgakukan, →ISBN.