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  2. Negative relationship - Wikipedia

    en.wikipedia.org/wiki/Negative_relationship

    Negative correlation can be seen geometrically when two normalized random vectors are viewed as points on a sphere, and the correlation between them is the cosine of the circular arc of separation of the points on a great circle of the sphere. [1] When this arc is more than a quarter-circle (θ > π/2), then the cosine is negative.

  3. Correlation function (quantum field theory) - Wikipedia

    en.wikipedia.org/wiki/Correlation_function...

    It is often preferable to work directly with these as they contain all the information that the full correlation functions contain since any disconnected diagram is merely a product of connected diagrams. By excluding other sets of diagrams one can define other correlation functions such as one-particle irreducible correlation functions.

  4. Taylor diagram - Wikipedia

    en.wikipedia.org/wiki/Taylor_diagram

    The sample Taylor diagram shown in Figure 1 [16] provides a summary of the relative skill with which several global climate models simulate the spatial pattern of annual mean precipitation. Eight models, each represented by a different letter on the diagram, are compared, and the distance between each model and the point labeled “observed ...

  5. Correlation - Wikipedia

    en.wikipedia.org/wiki/Correlation

    The information given by a correlation coefficient is not enough to define the dependence structure between random variables. The correlation coefficient completely defines the dependence structure only in very particular cases, for example when the distribution is a multivariate normal distribution. (See diagram above.)

  6. Linnett double-quartet theory - Wikipedia

    en.wikipedia.org/wiki/Linnett_Double-Quartet_Theory

    The four electrons in the same spin set will always keep apart as they experience a negative charge correlation and a negative spin correlation. Electrons in different spin sets can pair up (occupy the same spatial region) as they experience a negative charge correlation (which tends to keep them apart) but a positive spin correlation (which ...

  7. Correlation diagram - Wikipedia

    en.wikipedia.org/wiki/Correlation_diagram

    Terms such as correlation diagram(s), diagram(s) of correlation, and the like may refer to: Data visualization, the general process of presenting information visually; Statistical graphics, images depicting statistical information; In chemistry, there are several types of correlation diagrams:

  8. USA TODAY's music critic saw plenty of amazing concerts in 2024 including Olivia Rodrigo and The Eagles at the Sphere. Here are her top 10, ranked.

  9. Directional statistics - Wikipedia

    en.wikipedia.org/wiki/Directional_statistics

    The Bingham distribution is a distribution over axes in N dimensions, or equivalently, over points on the (N − 1)-dimensional sphere with the antipodes identified. [9] For example, if N = 2, the axes are undirected lines through the origin in the plane. In this case, each axis cuts the unit circle in the plane (which is the one-dimensional ...