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  2. Lambda - Wikipedia

    en.wikipedia.org/wiki/Lambda

    The lambda particle is a type of subatomic particle in subatomic particle physics. Lambda is the set of logical axioms in the axiomatic method of logical deduction in first-order logic. There is a poetical allusion to the use of Lambda as a shield blazon by the Spartans. [citation needed] [4] Lambda is the von Mangoldt function in mathematical ...

  3. 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).

  4. Cosmological constant - Wikipedia

    en.wikipedia.org/wiki/Cosmological_constant

    Thus, the Lambda-CDM model, the current standard model of cosmology which uses the FLRW metric, includes the cosmological constant, which is measured to be on the order of 10 −52 m −2. It may be expressed as 10 −35 s −2 (multiplying by c 2 ≈ 10 17 m 2 ⋅s −2 ) or as 10 −122 ℓ P −2 [ 27 ] (where ℓ P is the Planck length).

  5. List of equations in nuclear and particle physics - Wikipedia

    en.wikipedia.org/wiki/List_of_equations_in...

    Radioisotope time constant, mean lifetime of an atom before decay ... Physics for Scientists and Engineers: With Modern Physics (6th ed.).

  6. Radioactive decay - Wikipedia

    en.wikipedia.org/wiki/Radioactive_decay

    The decay constant, λ "lambda", the reciprocal of the mean lifetime (in s −1), sometimes referred to as simply decay rate. The mean lifetime, τ "tau", the average lifetime (1/e life) of a radioactive particle before decay. Although these are constants, they are associated with the statistical behavior of populations of atoms. In consequence ...

  7. Lambda-CDM model - Wikipedia

    en.wikipedia.org/wiki/Lambda-CDM_model

    The Lambda-CDM, Lambda cold dark matter, or ΛCDM model is a mathematical model of the Big Bang theory with three major components: a cosmological constant , denoted by lambda (Λ), associated with dark energy ;

  8. 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

  9. Lambda calculus - Wikipedia

    en.wikipedia.org/wiki/Lambda_calculus

    The pure lambda calculus does not have a concept of named constants since all atomic lambda-terms are variables, but one can emulate having named constants by setting aside a variable as the name of the constant, using abstraction to bind that variable in the main body, and apply that abstraction to the intended definition.