同余

同餘

tóngyú

adjective

Meanings

1 congruent (mathematics)
2 having the same residue modulo n

Characters

Examples

在模5的意义下，7和12同余。

Zài mó wǔ de yìyì xià, qī hé shí'èr tóngyú.

7 and 12 are congruent modulo 5.

同余方程在数论中很重要。

Tóngyú fāngchéng zài shùlùn zhōng hěn zhòngyào.

Congruence equations are important in number theory.

Tips

memory

余 means 'remainder' in division — so 同余 = 'same remainder' = the standard math sense of congruence (a ≡ b mod n).

Stroke Order

同 tóng

余 yú