Definition of 恒等関数 (こうとうかんすう)
こうとうかんすう
                        恒等関数
こうとうかんすう
koutoukansuu
noun
•
        
identity function, identity operator(mathematics)
Related Kanji
| 恒 | constancy, always | 
| 等 | etc., and so forth, class (first), quality, equal, similar | 
| 関 | connection, barrier, gateway, involve, concerning | 
| 数 | number, strength, fate, law, figures |