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  2. List of common physics notations - Wikipedia

    en.wikipedia.org/wiki/List_of_common_physics...

    newton meter squared per kilogram squared (N⋅m 2 /kg 2) shear modulus: pascal (Pa) or newton per square meter (N/m 2) gluon field strength tensor: inverse length squared (1/m 2) acceleration due to gravity: meters per second squared (m/s 2), or equivalently, newtons per kilogram (N/kg) magnetic field strength

  3. Gaussian function - Wikipedia

    en.wikipedia.org/wiki/Gaussian_function

    The function may then be expressed in terms of the FWHM, ... pi / 100: pi a = cos (theta) ^ 2 / (2 * sigma_X ^ 2) + sin (theta) ^ 2 / (2 * sigma_Y ^ 2); ...

  4. Divisor summatory function - Wikipedia

    en.wikipedia.org/wiki/Divisor_summatory_function

    Thus, for k = 2, D(x) = D 2 (x) counts the number of points on a square lattice bounded on the left by the vertical-axis, on the bottom by the horizontal-axis, and to the upper-right by the hyperbola jk = x. Roughly, this shape may be envisioned as a hyperbolic simplex.

  5. Confluent hypergeometric function - Wikipedia

    en.wikipedia.org/wiki/Confluent_hypergeometric...

    The powers of z are taken using −3π/2 < arg z ≤ π/2. [3] The first term is not needed when Γ( b − a ) is finite, that is when b − a is not a non-positive integer and the real part of z goes to negative infinity, whereas the second term is not needed when Γ( a ) is finite, that is, when a is a not a non-positive integer and the real ...

  6. Sigma - Wikipedia

    en.wikipedia.org/wiki/Sigma

    Sigma's original name may have been san, but due to the complicated early history of the Greek epichoric alphabets, san came to be identified as a separate letter in the Greek alphabet, represented as ΟΊ. [2] Herodotus reports that "san" was the name given by the Dorians to the same letter called "sigma" by the Ionians. [i] [3]

  7. Glossary of engineering: A–L - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_engineering:_A–L

    Difference here means the second minus the first. For instance, the sequence 5, 7, 9, 11, 13, 15, . . . is an arithmetic progression with common difference of 2. Aromatic hydrocarbon An aromatic hydrocarbon or arene [32] (or sometimes aryl hydrocarbon) [33] is a hydrocarbon with sigma bonds and delocalized pi electrons between carbon atoms ...

  8. Random cluster model - Wikipedia

    en.wikipedia.org/wiki/Random_cluster_model

    The Edwards-Sokal (ES) representation [5] of the Potts model is named after Robert G. Edwards and Alan D. Sokal.It provides a unified representation of the Potts and random cluster models in terms of a joint distribution of spin and bond configurations.