English Dictionary

Ford circle

noun

(geometry) Any one of a class of circles with centre at (p/q, 1/(2q²)) and radius 1/(2q²), where p/q is an irreducible fraction (i.e., p and q are coprime integers).

I saw a Ford car parked in the circle.

意味（1）

(geometry) Any one of a class of circles with centre at (p/q, 1/(2q²)) and radius 1/(2q²), where p/q is an irreducible fraction (i.e., p and q are coprime integers).

Every Ford circle is tangent to the horizontal axis y=0, and any two Ford circles are either disjoint or meet at a tangent.