In mathematics, the horizontal line test is a test used to determine whether a function is injective (i.e., one-to-one).
Other articles related to "horizontal line test, horizontal lines, horizontal line":
... Consider the horizontal lines in ... The function f is injective if and only if each horizontal line intersects the graph at most once ... In this case the graph is said to pass the horizontal line test ...
Famous quotes containing the words test, horizontal and/or line:
“The test of a given phrase would be: Is it worthy to be immortal? To make a beeline for something. Thats worthy of being immortal and is immortal in English idiom. I guess Ill split is not going to be immortal and is excludable, therefore excluded.”
—Robert Fitzgerald (19101985)
“I am a sort of martyr, as you see,
A horizontal monument to patience.
The calves of waitresses parade about
My helpless head upon this sodden floor.
Well, I am down again, but not yet out.
O sweet frustrations, I shall be back for more.”
—Richard Wilbur (b. 1921)
“When I had mapped the pond ... I laid a rule on the map lengthwise, and then breadthwise, and found, to my surprise, that the line of greatest length intersected the line of greatest breadth exactly at the point of greatest depth.”
—Henry David Thoreau (18171862)