Size consistency and size extensivity

In quantum chemistry, size consistency and size extensivity are concepts about how the behaviour of a quantum chemistry calculations changes with size. Size consistency (or strict separability) is a property that guarantees the consistency of the energy behaviour when interaction between the involved molecular system is nullified (for example, by distance). Size-extensivity, introduced by Bartlett, is a more mathematically formal characteristic which refers to the correct (linear) scaling of a method with the number of electrons.

单词	Size consistency
释义	Size consistency 英语百科 Size consistency and size extensivity In quantum chemistry, size consistency and size extensivity are concepts about how the behaviour of a quantum chemistry calculations changes with size. Size consistency (or strict separability) is a property that guarantees the consistency of the energy behaviour when interaction between the involved molecular system is nullified (for example, by distance). Size-extensivity, introduced by Bartlett, is a more mathematically formal characteristic which refers to the correct (linear) scaling of a method with the number of electrons.
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