导数曲率四次曲线
quartic of derivative curvature
分段四次Ball曲线
segmented quartic Ball curve
甲种四次挠线
ammonia-water-lithium bromide
末端距四次矩
fourth moment of end-to-end distance
三次和四次Diophantine方程
cubic and quartic Diophantine equation
三元四次Diophantine方程
ternary quartic diophantine equation
ternary quadratic diophantine equation