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  2. Lambda calculus - Wikipedia

    en.wikipedia.org/wiki/Lambda_calculus

    In fact computability can itself be defined via the lambda calculus: a function F: N → N of natural numbers is a computable function if and only if there exists a lambda expression f such that for every pair of x, y in N, F(x)=y if and only if f x = β y, where x and y are the Church numerals corresponding to x and y, respectively and = β ...

  3. Lambda function - Wikipedia

    en.wikipedia.org/wiki/Lambda_function

    Dirichlet lambda function, λ(s) = (1 – 2 −s)ζ(s) where ζ is the Riemann zeta function; Liouville function, λ(n) = (–1) Ω(n) Von Mangoldt function, Λ(n) = log p if n is a positive power of the prime p; Modular lambda function, λ(τ), a highly symmetric holomorphic function on the complex upper half-plane

  4. Wavelength - Wikipedia

    en.wikipedia.org/wiki/Wavelength

    A quantity related to the wavelength is the angular wavelength (also known as reduced wavelength), usually symbolized by ƛ ("lambda-bar" or barred lambda). It is equal to the ordinary wavelength reduced by a factor of 2π (ƛ = λ/2π), with SI units of meter per radian. It is the inverse of angular wavenumber (k = 2π/λ).

  5. Modular lambda function - Wikipedia

    en.wikipedia.org/wiki/Modular_lambda_function

    Modular lambda function in the complex plane. In mathematics , the modular lambda function λ(τ) [ note 1 ] is a highly symmetric Holomorphic function on the complex upper half-plane . It is invariant under the fractional linear action of the congruence group Γ(2), and generates the function field of the corresponding quotient, i.e., it is a ...

  6. Carmichael function - Wikipedia

    en.wikipedia.org/wiki/Carmichael_function

    The Carmichael lambda function of a prime power can be expressed in terms of the Euler totient. Any number that is not 1 or a prime power can be written uniquely as the product of distinct prime powers, in which case λ of the product is the least common multiple of the λ of the prime power factors.

  7. US economic output hits highest level since April 2022 amid ...

    www.aol.com/finance/us-economic-output-hits...

    The uptick in activity was largely driven by the services sector. The services component of S&P's report showed the index registered 57 this month, up from 55 in October and the highest level in ...

  8. Stocks in these 4 sectors are best positioned to rally into ...

    www.aol.com/stocks-4-sectors-best-positioned...

    Utilities, meanwhile, are the best defensive sector amid strong AI and EV demand, the analysts say. Investors should keep a close eye on stocks in a few key sectors heading into next year ...

  9. Diffraction-limited system - Wikipedia

    en.wikipedia.org/wiki/Diffraction-limited_system

    In a digital camera, diffraction effects interact with the effects of the regular pixel grid. The combined effect of the different parts of an optical system is determined by the convolution of the point spread functions (PSF). The point spread function of a diffraction limited circular-aperture lens is simply the Airy disk. The point spread ...