Parity may refer to:
- Parity (physics), a symmetry property of physical quantities or processes under spatial inversion
- Parity (mathematics), indicates whether a number is even or odd
- Parity of a permutation, indicates whether a permutation has an even or odd number of inversions
- Parity function, a Boolean function whose value is 1 if the input vector has an odd number of ones
- Parity flag in computing, indicates if the number of set bits is odd or even in the binary representation of the result of the last operation
- Parity bit in computing, sets the parity of transmitted data for the purpose of error detection
- Parity file in data processing, created in conjunction with data files and used to check data integrity and assist in data recovery
- Parity (biology), the number of times a woman or female animal has given birth
- Parity (charity), UK equal rights organisation
- Parity (law), legal principle
- Purchasing power parity, in economics, the exchange rate required to equalise the purchasing power of different currencies
- Interest rate parity, in finance, 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
- Put–call parity, in financial mathematics, defines a relationship between the price of a European call option and a European put option
- Parity (sports), an equal playing field for all participants, regardless of their economic circumstances
- Potty parity, equalization of waiting times for males and females in restroom queues
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- Grid parity of renewable energy
Famous quotes containing the word parity:
“The U.S. is becoming an increasingly fatherless society. A generation ago, an American child could reasonably expect to grow up with his or her father. Today an American child can reasonably expect not to. Fatherlessness is now approaching a rough parity with fatherhood as a defining feature of American childhood.”
—David Blankenhorn (20th century)