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  2. Size consistency and size extensivity - Wikipedia

    en.wikipedia.org/wiki/Size_consistency_and_size...

    In quantum chemistry, size consistency and size extensivity are concepts relating to how the behaviour of quantum-chemistry calculations changes with the system size. Size consistency (or strict separability) is a property that guarantees the consistency of the energy behaviour when interaction between the involved molecular subsystems is nullified (for example, by distance).

  3. Coupled cluster - Wikipedia

    en.wikipedia.org/wiki/Coupled_cluster

    The choice of the exponential ansatz is opportune because (unlike other ansatzes, for example, configuration interaction) it guarantees the size extensivity of the solution. Size consistency in CC theory, also unlike other theories, does not depend on the size consistency of the reference wave function.

  4. Davidson correction - Wikipedia

    en.wikipedia.org/wiki/Davidson_correction

    The size-consistency and size-extensivity problems of truncated CI are alleviated but still exist. In small molecules, accuracy of the corrected energies can be similar to results from coupled cluster theory calculations. The Davidson correction does not give information about the wave function.

  5. Intensive and extensive properties - Wikipedia

    en.wikipedia.org/wiki/Intensive_and_extensive...

    An extensive property is a physical quantity whose value is proportional to the size of the system it describes, [8] or to the quantity of matter in the system. For example, the mass of a sample is an extensive quantity; it depends on the amount of substance.

  6. Top five most searched-for recipes in 2024 - AOL

    www.aol.com/top-five-most-searched-recipes...

    Here's a look at the top five recipes Americans searched for on Google in 2024, with everything from muffins to mac and cheese to "dense bean salads."

  7. Size extensivity - Wikipedia

    en.wikipedia.org/?title=Size_extensivity&redirect=no

    From Wikipedia, the free encyclopedia. Redirect page

  8. 5 pivotal 2025 contests that could also be Trump litmus tests

    www.aol.com/news/5-pivotal-2025-contests-could...

    Here are the key races to watch next year: New Jersey governor. New Jersey has been seen as a heavily Democratic state, won by President Biden by 16 points in 2020.

  9. Holiday Stress & Anxiety: 6 Ways to Cope

    www.aol.com/lifestyle/holiday-stress-anxiety-6...

    Holiday Stress and Anxiety: 6 Ways to Cope. The holiday season is often called the most wonderful time of the year — but for many, it can actually be the most stressful time of year.