Proper may refer to:
- Proper (liturgy), the part of a Christian liturgy that is specific to the date within the Liturgical Year
- Proper frame, such system of reference in which object is stationary (non moving), sometimes also called a co-moving frame
- Proper (heraldry), in heraldry, means depicted in natural colors
- Proper or appropriate conduct
- Proper (often capitalized PROPER), a corrected release in response to a previously released online video or movie that contains transcoding or other playback errors.
In mathematics:
- Proper map, in topology, a property of continuous function between topological spaces, if inverse images of compact subsets are compact
- Proper morphism, in algebraic geometry, an analogue of a proper map for algebraic varieties
- Proper transfer function, a transfer function in control theory in which the degree of the numerator does not exceed the degree of the denominator
- Proper equilibrium, in game theory, a refinement of the Nash equilibrium.
- Proper subset
- Proper space
Famous quotes containing the word proper:
“In England if something goes wrong—say, if one finds a skunk in the garden—he writes to the family solicitor, who proceeds to take the proper measures; whereas in America, you telephone the fire department. Each satisfies a characteristic need; in the English, love of order and legalistic procedure; and here in America, what you like is something vivid, and red, and swift.”
—Alfred North Whitehead (1861–1947)
“Anyone, however, who has had dealings with dates knows that they are worse than elusive, they are perverse. Events do not happen at the right time, nor in their proper sequence. That sense of harmony with place and season which is so stong in the historian—if he be a readable historian—is lamentably lacking in history, which takes no pains to verify his most convincing statements.”
—Agnes Repplier (1858–1950)
“I loved reading, and had a great desire of attaining knowledge; but whenever I asked questions of any kind whatsoever, I was always told, “such things were not proper for girls of my age to know.”... For “Miss must not enquire too far into things, it would turn her brain; she had better mind her needlework, and such things as were useful for women; reading and poring on books would never get me a husband.””
—Sarah Fielding (1710–1768)