exclusion principle


Also found in: Dictionary, Thesaurus, Legal, Financial, Encyclopedia, Wikipedia.

exclusion principle

the principle that two species with the same ecological requirements cannot exist together.
References in periodicals archive ?
For example, for the Pauli Exclusion Principle, between it is completely valid and it is completely invalid, there are four neutralities or aspects that the Pauli Exclusion Principle is only valid under certain conditions.
However, the Pauli exclusion principle of restriction 3 does not hold for the d quark.
This claim is usually derived from an exclusion principle stating that if a higher-level property F supervenes on a physical property F* that is causally sufficient for a property G, then F cannot cause G.
Award winning author Leona Gom brings readers into a world many all know too much with "The Exclusion Principle" is a story of marriage and astronomy as Gom presents a tale of the typical marriage, one that seems to work but not much more than that.
That violates a fundamental law of ecology-the competitive exclusion principle, which states that two species competing for the same limited resource cannot stably coexist.
Since the Pauli exclusion principle for identical particles forbids the interaction of two neutrons in the triplet state, the cross section [[sigma].sub.t] is expected to be zero, and the measured cross section [sigma] is equal to [pi][a.sub.nn.sup.2].
EXCLUSION PRINCIPLE Although Tozier started the auction on a whim, his offer was serious: 40 hours of his time to collaborate on a project of the winning bidder's choosing in one of Tozier's areas of expertise, which include machine learning and complex systems.
This is a necessary step in forming the condensate, since the Pauli exclusion principle states that two fermions can only occupy the same quantum state if they are paired--effectively forming a boson.
The competitive exclusion principle states that, "two species that have exactly the same requirements cannot coexist in exactly the same habitat." (19) This differs from predation or parasitism in which one species feeds off another species.
The role of principle (a') is, as can be seen, similar to that played by the generalized version of the exclusion principle in the last section.
The exclusion principle I'm applying affects only those born outside Wales.
By taking into account the Exclusion principle and the Fermi-Dirac Distribution, a model can be made that more accurately describes how the electrons actually behave.