Parity is a concept of equality of status or functional equivalence. It has several different specific definitions.

• Parity (physics), the name of the symmetry of interactions under spatial inversion
• Parity (mathematics) indicates whether a number is even or odd
• Parity (medicine), the number of times a woman or female animal has given birth
• Parity Pricing (marketing)
• Parity bit, in computing, a very simple example of an error detecting code
• Purchasing power parity, in economics, an estimate of the exchange rate required to equalise the purchasing power of different currencies, given the prices of goods and services in the countries concerned
• Interest rate parity, in finance, refers to the notion that the differential in interest rates between two countries is equal to the differential between the forward exchange rate and the spot exchange rate
• Base parity, in human genetics, the G/C ratio in regions of DNA
• Put–call parity, in financial mathematics, defines a relationship between the price of a European call option and a European put option—both with the identical strike price and expiry
• Parity (sports) refers to engineering an equal playing field in which all teams can compete, regardless of their economic circumstances
• In demography, the number of reproductive events (births)
• Potty parity attempts to equalize the waiting times of males and females in restroom queues by designating or building more women's restrooms, giving them more facilities to use
• A tactic in othello
• Militarily, it refers to having a comparable force as one's enemy, such as geopolitically as in mutual assured destruction
• Parity is a case on a Rubik's Revenge cube that may not occur on 3x3 Rubik's Cube

In Physics, a parity transformation (also called parity inversion) is the flip in the sign of one Spatial Coordinate. In Mathematics, the parity of an object states whether it is even or odd For other uses of the term in other fields see Parity. In Medicine, parity is a technical term that refers to the number of times Error detection If an odd number of bits (including the parity bit are changed in transmission of a set of bits then parity bit will be incorrect and will thus indicate The purchasing power parity ( PPP) theory uses the long-term equilibrium Exchange rate of two currencies to equalize their Purchasing power. The interest rate parity is the basic identity that relates Interest rates and Exchange rates The identity is theoretical and usually follows from assumptions imposed In Financial mathematics, put-call parity defines a relationship between the price of a Call option and a Put option —both with the identical Strike Parity in sports is defined as attempting to make an equal playing field for all participants specifically with regard to financial issues Demography is the statistical study of all Populations. It can be a very general science that can be applied to any kind of dynamic population that is one that changes over Potty parity is the nickname of a law aimed at remedying the age old problem of long lines at the ladies' restrooms of public places such as theaters stadiums and gigs Reversi (also marketed by Pressman under the trade name Othello) is an abstract strategy Board game which involves play by two parties on Mutual assured destruction ( MAD; sometimes written as mutually assured destruction) is a Doctrine of military Strategy in which a full-scale The Rubik's Revenge is the 4×4×4 version of Rubik's Cube. Invented by Péter Sebestény the Rubik's Revenge was nearly called the Sebestény Cube until a somewhat last-minute

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