نتایج جستجو برای: exclusion principle
تعداد نتایج: 241711 فیلتر نتایج به سال:
The occupied and unoccupied fermionic BPS quantum states of a type-IIA string stretched between a D6-brane and an orthogonal D2-brane are described in M-theory by two particular holomorphic curves embedded in a Kaluza–Klein monopole. The absence of multiply-occupied fermionic states — the Pauli exclusion principle — is manifested in Mtheory by the absence of any other holomorphic curves satisfy...
Biodiversity conservation becoming increasingly urgent. It is important to find mechanisms of competitive coexistence of species with different fitness in especially difficult circumstances on one limiting resource, in isolated stable uniform habitat, without any trade-offs and cooperative interactions. Here we show a mechanism of competitive coexistence based on a soliton-like behaviour of pop...
The competitive exclusion principle (CEP) states that no equilibrium is possible if n species exploit fewer than n resources. This principle does not appear to hold in nature, where high biodiversity is commonly observed, even in seemingly homeogenous habitats. Although various mechanisms, such as spatial heterogeneity or chaotic fluctuations, have been proposed to explain this coexistence, non...
Christian List (London School of Economics) and Peter Menzies (Macquarie University) (forthcoming in the Journal of Philosophy) ABSTRACT It is often argued that higher-level special-science properties cannot be causally efficacious since the lower-level physical properties on which they supervene are doing all the causal work. This claim is usually derived from an exclusion principle stating th...
where U = {1, 2, . . . , n}. Example. Suppose we ask how many integers less than 120 are relatively prime to it. Since 120 has prime factors 2, 3, and 5, any number that is relatively prime to it is not a multiple of any of these. We can solve this using the Inclusion-Exclusion Principle as follows. Let A = {1, 2, . . . , 120}, the set of integers from 1 to 120. Let S1 be the multiples of 2 in ...
The Pauli principle, QRPA and the two-neutrino double beta decay * Abstract We examine the violation of the Pauli exclusion principle in the Quasipar-ticle Random Phase Approximation (QRPA) calculation of the two-neutrino double beta decay matrix elements, which has its origin in the quasi-boson approximation. For that purpose we propose a new renormalized QRPA with proton-neutron pairing metho...
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