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  2. Multi-factor authentication - Wikipedia

    en.wikipedia.org/wiki/Multi-factor_authentication

    Multi-factor authentication ( MFA; two-factor authentication, or 2FA, along with similar terms) is an electronic authentication method in which a user is granted access to a website or application only after successfully presenting two or more pieces of evidence (or factors) to an authentication mechanism. MFA protects personal data —which ...

  3. Irreducible polynomial - Wikipedia

    en.wikipedia.org/wiki/Irreducible_polynomial

    Irreducible polynomial. In mathematics, an irreducible polynomial is, roughly speaking, a polynomial that cannot be factored into the product of two non-constant polynomials. The property of irreducibility depends on the nature of the coefficients that are accepted for the possible factors, that is, the ring to which the coefficients of the ...

  4. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The number (; spelled out as " pi ") is a mathematical constant that is the ratio of a circle 's circumference to its diameter, approximately equal to 3.14159. The number π appears in many formulae across mathematics and physics.

  5. Molar concentration - Wikipedia

    en.wikipedia.org/wiki/Molar_concentration

    For example, if a sodium carbonate solution (Na 2 CO 3) has a formal concentration of c(Na 2 CO 3) = 1 mol/L, the molar concentrations are c(Na +) = 2 mol/L and c(CO 23) = 1 mol/L because the salt dissociates into these ions. Units. In the International System of Units (SI), the coherent unit for molar concentration is mol/m 3.

  6. Form factor (electronics) - Wikipedia

    en.wikipedia.org/wiki/Form_factor_(electronics)

    Form factor (electronics) In electronics or electrical engineering the form factor of an alternating current waveform (signal) is the ratio of the RMS ( root mean square) value to the average value (mathematical mean of absolute values of all points on the waveform). [1] It identifies the ratio of the direct current of equal power relative to ...

  7. M.2 - Wikipedia

    en.wikipedia.org/wiki/M.2

    The large chip on the M.2 module is a single-chip SSD conforming to the M.2 1620 ball grid array (BGA) form factor. A graphic depicting sizes of some of the M.2 SSDs. Note the that first two numbers refer to the width in 'mm' and the rest of the numbers refer to the length in 'mm' such that a 2242-sized M.2 SSD is 22mm x 42mm in dimensions.

  8. Polynomial expansion - Wikipedia

    en.wikipedia.org/wiki/Polynomial_expansion

    Polynomial expansion. In mathematics, an expansion of a product of sums expresses it as a sum of products by using the fact that multiplication distributes over addition. Expansion of a polynomial expression can be obtained by repeatedly replacing subexpressions that multiply two other subexpressions, at least one of which is an addition, by ...

  9. Type I and type II errors - Wikipedia

    en.wikipedia.org/wiki/Type_I_and_type_II_errors

    In addition, we suppose that the measurements X 1, X 2, X 3 are modeled as normal distribution N(μ,2). Then, T should follow N(μ,2/) and the parameter μ represents the true speed of passing vehicle. In this experiment, the null hypothesis H 0 and the alternative hypothesis H 1 should be H 0: μ=120 against H 1: μ>120.

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