Pair

Encyclopedia

The word

**pair**, derived via the French words*pair/paire*from the Latin*par*'equal', can refer to:- 2 (number), two of something
- Topological pairTopological pairIn mathematics, more specifically algebraic topology, a pair is short-hand for an inclusion of topological spaces i\colon A\hookrightarrow X. Sometimes i is assumed to be a cofibration...

, an inclusion of topological spaces. - TupleTupleIn mathematics and computer science, a tuple is an ordered list of elements. In set theory, an n-tuple is a sequence of n elements, where n is a positive integer. There is also one 0-tuple, an empty sequence. An n-tuple is defined inductively using the construction of an ordered pair...
- Product typeProduct typeIn programming languages and type theory, a product of types is another, compounded, type in a structure. The "operands" of the product are types, and the structure of a product type is determined by the fixed order of the operands in the product. An instance of a product type retains the fixed...
- Au pairAu pairAn au pair is a domestic assistant from a foreign country working for, and living as part of, a host family. Typically, au pairs take on a share of the family's responsibility for childcare as well as some housework, and receive a small monetary allowance for personal use...

, a work agreement - CoupleCoupleCouple may refer to:*Two items of a type.**Two members of an intimate relationship*Couple , a system of forces with a resultant moment but no resultant force*Thermocouple, a type of temperature sensor...

, various senses for two joined things - EvenEven-General:* Even , a Scandinavian male personal name* Even , an ethnic group from Siberia and Russian Far East**Even language, a language spoken by the Evens* Odd and Even, a solitaire card game which is played with two decks of playing cards...

number, in roulette etc. - Ordered pairOrdered pairIn mathematics, an ordered pair is a pair of mathematical objects. In the ordered pair , the object a is called the first entry, and the object b the second entry of the pair...

, in Mathematics and set theory - Twisted pairTwisted pairTwisted pair cabling is a type of wiring in which two conductors are twisted together for the purposes of canceling out electromagnetic interference from external sources; for instance, electromagnetic radiation from unshielded twisted pair cables, and crosstalk between neighboring pairs...

, a couple of electric wires twisted together - Pair (parliamentary convention)Pair (parliamentary convention)Pairing is a system whereby two members of parliament from opposing political parties may agree to abstain where one member is unable to vote, due to other commitments, illness, travel problems, etc...

, matching of members unable to attend, so as not to change the voting margin -
*pair*, the French equivalent of peer, holder of a French PairiePairieThe French word pairie is the equivalent of the English word peerage, in the sense of an individual title carrying the rank of Pair , which derives from the Latin par 'equal', and signifies the members of an exclusive body of noblemen and prelates, considered to be the highest social order -not...

, French high title roughly equivalent to a member of the British peerage -
*pair*, a member of the Prussian House of LordsPrussian House of LordsThe Prussian House of Lords was the first chamber of the Parliament of the Kingdom of Prussia from 1850-1918. The second chamber was the Prussian House of Representatives . The House of Lords was created on January 31, 1850 with the adoption of the Constitution of the Kingdom of Prussia... - Pair (CricketCricketCricket is a bat-and-ball game played between two teams of 11 players on an oval-shaped field, at the centre of which is a rectangular 22-yard long pitch. One team bats, trying to score as many runs as possible while the other team bowls and fields, trying to dismiss the batsmen and thus limit the...

): "getting a pair" means being out for 0 in both innings of a match - A handshaking process in BluetoothBluetoothBluetooth is a proprietary open wireless technology standard for exchanging data over short distances from fixed and mobile devices, creating personal area networks with high levels of security...

communications - P
_{air}, PressurePressurePressure is the force per unit area applied in a direction perpendicular to the surface of an object. Gauge pressure is the pressure relative to the local atmospheric or ambient pressure.- Definition :...

of air in a system - A team in pair skatingPair skatingPair skating is a figure skating discipline. International Skating Union regulations describe pair teams as consisting of "one lady and one man." The sport is distinguished from ice dancing and single skating by elements unique to pair skating, including overhead lifts, twist lifts, death spirals,...
- PAIR, the research group Pain & Autonomics - Integrative Research at the University of Jena in GermanyGermanyGermany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

## See also

- PairingPairingThe concept of pairing treated here occurs in mathematics.-Definition:Let R be a commutative ring with unity, and let M, N and L be three R-modules.A pairing is any R-bilinear map e:M \times N \to L...
- PearPearThe pear is any of several tree species of genus Pyrus and also the name of the pomaceous fruit of these trees. Several species of pear are valued by humans for their edible fruit, but the fruit of other species is small, hard, and astringent....

- fruit - Pare - Tanzanian ethnic group
- Paired test in statistical hypothesis testingStatistical hypothesis testingA statistical hypothesis test is a method of making decisions using data, whether from a controlled experiment or an observational study . In statistics, a result is called statistically significant if it is unlikely to have occurred by chance alone, according to a pre-determined threshold...