In mathematics, the horizontal line test is a test used to determine whether a function is injective (i.e., one-to-one).
Read more about Horizontal Line Test: Horizontal Line Test in Calculus, Horizontal Line Test in Set Theory
Famous quotes containing the words horizontal, line and/or test:
“And yet out of eternity, a thread
separates itself on the blackness,
a horizontal thread
that fumes a little with pallor upon the dark.”
—D.H. (David Herbert)
“A modern democracy is a tyranny whose borders are undefined; one discovers how far one can go only by traveling in a straight line until one is stopped.”
—Norman Mailer (b. 1923)
“Unless the people can choose their leaders and rulers, and can revoke their choice at intervals long enough to test their measures by results, the government will be a tyranny exercised in the interests of whatever classes or castes or mobs or cliques have this choice.”
—George Bernard Shaw (1856–1950)