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  2. Ordinal analysis - Wikipedia

    en.wikipedia.org/wiki/Ordinal_analysis

    Ψ represents either Rathjen's or Stegert's Psi. φ represents Veblen's function. ω represents the first transfinite ordinal. ε α represents the epsilon numbers. Γ α represents the gamma numbers (Γ 0 is the Feferman–Schütte ordinal) Ω α represent the uncountable ordinals (Ω 1, abbreviated Ω, is ω 1). Countability is considered ...

  3. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    the Pi function, i.e. the Gamma function when offset to coincide with the factorial; the complete elliptic integral of the third kind; the fundamental groupoid; osmotic pressure; represents: Archimedes' constant (more commonly just called Pi), the ratio of a circle's circumference to its diameter; the prime-counting function

  4. Template:Greek numeral/testcases - Wikipedia

    en.wikipedia.org/wiki/Template:Greek_numeral/...

    If there are many examples of a complicated template, later ones may break due to limits in MediaWiki; see the HTML comment "NewPP limit report" in the rendered page. You can also use Special:ExpandTemplates to examine the results of template uses. You can test how this page looks in the different skins and parsers with these links:

  5. Limit ordinal - Wikipedia

    en.wikipedia.org/wiki/Limit_ordinal

    It is a limit point of the class of ordinal numbers, with respect to the order topology. (The other ordinals are isolated points.) Some contention exists on whether or not 0 should be classified as a limit ordinal, as it does not have an immediate predecessor; some textbooks include 0 in the class of limit ordinals [1] while others exclude it. [2]

  6. Squeeze theorem - Wikipedia

    en.wikipedia.org/wiki/Squeeze_theorem

    Illustration of the squeeze theorem When a sequence lies between two other converging sequences with the same limit, it also converges to this limit.. In calculus, the squeeze theorem (also known as the sandwich theorem, among other names [a]) is a theorem regarding the limit of a function that is bounded between two other functions.

  7. Euler's identity - Wikipedia

    en.wikipedia.org/wiki/Euler's_identity

    It can be seen that as N gets larger (1 + ⁠ iπ / N ⁠) N approaches a limit of −1. Euler's identity asserts that e i π {\displaystyle e^{i\pi }} is equal to −1. The expression e i π {\displaystyle e^{i\pi }} is a special case of the expression e z {\displaystyle e^{z}} , where z is any complex number .

  8. Permittivity - Wikipedia

    en.wikipedia.org/wiki/Permittivity

    The upper limit of this integral can be extended to infinity as well if one defines χ(Δt) = 0 for Δt < 0. An instantaneous response would correspond to a Dirac delta function susceptibility χ(Δt) = χδ(Δt). It is convenient to take the Fourier transform with respect to time and write this relationship as a function of frequency.

  9. Nonstandard calculus - Wikipedia

    en.wikipedia.org/wiki/Nonstandard_calculus

    Keisler's Elementary Calculus: An Infinitesimal Approach defines continuity on page 125 in terms of infinitesimals, to the exclusion of epsilon, delta methods. The derivative is defined on page 45 using infinitesimals rather than an epsilon-delta approach. The integral is defined on page 183 in terms of infinitesimals.