# proper

91

**Proper time**— In relativity, proper time is time measured by a single clock between events that occur at the same place as the clock. It depends not only on the events but also on the motion of the clock between the events. An accelerated clock will measure a… …92

**Proper morphism**— In algebraic geometry, a proper morphism between schemes is an analogue of a proper map between topological spaces. Contents 1 Definition 2 Examples 3 Properties and characterizations of proper morphisms …93

**Proper velocity**— η.In flat spacetime, proper velocity is the ratio between distance traveled relative to a reference map frame (used to define simultaneity) and proper time τ elapsed on the clocks of the traveling object. It equals the object s momentum p divided …94

**Proper adjective**— In English usage, a proper adjective is an adjective that takes an initial capital letter. A common adjective is an adjective that is not a proper adjective. The term is used informally only; it is not used by grammarians or linguists. Contents 1 …95

**proper name**— noun a noun that denotes a particular thing; usually capitalized • Syn: ↑proper noun • Ant: ↑common noun (for: ↑proper noun) • Hypernyms: ↑noun * * * …96

**Proper orbital elements**— The proper orbital elements of an orbit are constants of motion of an object in space that remain practically unchanged over an astronomically long timescale. The term is usually used to describe the three quantities: * proper semimajor axis ( ap …97

**Proper Cantonese pronunciation**— Jyutping is used as the pronunciation guide in this article From the 1980s onwards, the proper Cantonese pronunciation has been much promoted in Hong Kong, with the scholar Richard Ho Man Wui as the iconic campaigner. The very idea of proper… …98

**Proper forcing axiom**— In the mathematical field of set theory, the proper forcing axiom ( PFA ) is a significant strengthening of Martin s axiom, where forcings with the countable chain condition (ccc) are replaced by proper forcings. Statement A forcing or partially… …99

**Proper equilibrium**— Infobox equilibrium name=Proper equilibrium subsetof=Trembling hand perfect equilibrium discoverer=Roger B. MyersonProper equilibrium is a refinement of Nash Equilibrium due to Roger B. Myerson. Proper equilibrium further refines Reinhard Selten… …100

**Proper map**— In mathematics, a continuous function between topological spaces is called proper if inverse images of compact subsets are compact. In algebraic geometry, the analogous concept is called a proper morphism. Definition A function f : X rarr; Y… …