What is "exclusion principle"

n. no two electrons or protons or neutrons in a given system can be in states characterized by the same set of quantum numbers [syn: Pauli exclusion principle]

The Exclusion principle is a philosophical principle that states:

If an event e causes event e*, then there is no event e# such that e# is non-supervenient on e and e# causes e*.

Exclusion principle may refer to:

• Exclusion principle (philosophy), epistemological principle
• In economics, the exclusion principle states "the owner of a private good may exclude others from use unless they pay."; it excludes those who are unwilling or unable to pay for the private good, but does not apply to public goods that are known to be indivisible: such goods need only to be available to obtain their benefits rather than purchased
• Pauli exclusion principle, quantum mechanical principle