fāng chéng zǔ
(math.) simultaneous equations
system of equations
wēi fēn fāng chéng
differential equation (math.)
piān wēi fēn fāng chéng
partial differential equation (PDE)
cháng wēi fēn fāng chéng
ordinary differential equation (ODE)
jī fēn fāng chéng
integral equation (math.)
dài shù fāng chéng
algebraic equation
polynomial equation
chā fēn fāng chéng
difference equation (math.)
bù dìng fāng chéng
(math.) indeterminate equation
Xuē dìng è fāng chéng
Schrödinger's wave equation
bō fāng chéng
wave equation (math. physics)
duō xiàng shì fāng chéng
(math.) polynomial equation
duō xiàng shì fāng chéng zǔ
(math.) system of polynomial equations
lián lì fāng chéng shì
simultaneous equations (math.)