imaginary circle

imaginary circle

[i¦maj·ə‚ner·ē ′sər·kəl]
(mathematics)
The set of points in the x-y plane that satisfy the equation x 2+ y 2= -r 2, or (x - h)2+ (y - k)2= -r 2, where r is greater than zero, and x, y, h, and k are allowed to be complex numbers.
References in classic literature ?
He drew an imaginary circle on the stones of the roof, and burnt a pinch of powder in it, which sent up a small cloud of aromatic smoke, whereat everybody fell back and began to cross themselves and get un- comfortable.
What name is given to the imaginary circle round the Earth at a latitude just over 66 degrees north?
She expressed some weariness of the recent economic woes, but nonetheless smiled and gestured an imaginary circle of energy around her with her hands.
But I guess what perfection means to me is a kind of facility with whatever my character is supposed to do -- and a hope to draw that imaginary circle, whatever that idea is.
The equator is an imaginary circle around the middle of our planet, as if cutting it in two.
Bringing arm to bottom of an imaginary circle and bury shoulder.
An inscribed circle is the largest imaginary circle that will fit in the insert in 1/8 increments.
For a zero-knowledge proof, the star-shaped graph (top) can be redrawn so that all of the points fall on the circumference of an imaginary circle (bottom), yet the connecting lines still join the same points as in the original graph.
It is an imaginary circle on the soil surface that corresponds to the outside foliage perimeter.
He makes imaginary circles in the air and it seems we will be at least two hours late.