black willows
plural of rubrician
(geometry) A conic section formed by the intersection of a cone with a plane that intersects the base of the cone and is not tangent to the cone. The function y(x) = 1/x draws a hyperbola.
That does not branch.
plural of black willow
嵐の間、川辺に並ぶ古い黒ヤナギが不気味にきしんだ。
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