Bullet-nose curve
（重定向自Bullet nose）
![Bullet-nose curve with a = 1 and b = 1](/Images/godic/202501/02/Bullet_nose_curve.svg5244.png")
In mathematics, a bullet-nose curve is a unicursal quartic curve with three inflection points, given by the equation
The bullet curve has three double points in the real projective plane, at x=0 and y=0, x=0 and z=0, and y=0 and z=0, and is therefore a unicursal (rational) curve of genus zero.