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:
“In bourgeois society, the French and the industrial revolution transformed the authorization of political space. The political revolution put an end to the formalized hierarchy of the ancien regimé.... Concurrently, the industrial revolution subverted the social hierarchy upon which the old political space was based. It transformed the experience of society from one of vertical hierarchy to one of horizontal class stratification.”
—Donald M. Lowe, U.S. historian, educator. History of Bourgeois Perception, ch. 4, University of Chicago Press (1982)
“This wild night, gathering the washing as if it were flowers
animal vines twisting over the line and
slapping my face lightly, soundless merriment
in the gesticulations of shirtsleeves ...”
—Denise Levertov (b. 1923)
“The test of a man’s or woman’s breeding is how they behave in a quarrel. Anybody can behave well when things are going smoothly.”
—George Bernard Shaw (1856–1950)