• Thumbnail for Heaviside step function
    The Heaviside step function, or the unit step function, usually denoted by H or θ (but sometimes u, 1 or 𝟙), is a step function named after Oliver Heaviside...
    14 KB (2,157 words) - 11:06, 13 June 2025
  • Thumbnail for Step function
    Piecewise Sigmoid function Simple function Step detection Heaviside step function Piecewise-constant valuation "Step Function". "Step Functions - Mathonline"...
    7 KB (947 words) - 18:31, 16 February 2025
  • Thumbnail for Dirac delta function
    in 1930. However, Oliver Heaviside, 35 years before Dirac, described an impulsive function called the Heaviside step function for purposes and with properties...
    96 KB (14,230 words) - 04:36, 14 May 2025
  • Thumbnail for Oliver Heaviside
    Oliver Heaviside (/ˈhɛvisaɪd/ HEH-vee-syde; 18 May 1850 – 3 February 1925) was an English mathematician and physicist who invented a new technique for...
    42 KB (4,664 words) - 19:18, 7 June 2025
  • Thumbnail for Black–Scholes equation
    0\}}-1)=K\left(e^{x}-1\right)H(x),} where H(x) is the Heaviside step function. The Heaviside function corresponds to enforcement of the boundary data in...
    15 KB (2,715 words) - 23:39, 18 April 2025
  • Thumbnail for Sign function
    value Heaviside step function Negative number Rectangular function Sigmoid function (Hard sigmoid) Step function (Piecewise constant function) Three-way...
    16 KB (2,711 words) - 09:57, 3 June 2025
  • Thumbnail for Rectangular function
    The rectangular function (also known as the rectangle function, rect function, Pi function, Heaviside Pi function, gate function, unit pulse, or the normalized...
    10 KB (1,625 words) - 21:11, 28 May 2025
  • Thumbnail for Indicator function
    Free variables and bound variables Heaviside step function Identity function Iverson bracket Kronecker delta, a function that can be viewed as an indicator...
    17 KB (2,543 words) - 13:47, 8 May 2025
  • Truncated power functions can be used for construction of B-splines. x ↦ x + 0 {\displaystyle x\mapsto x_{+}^{0}} is the Heaviside function. χ [ a , b )...
    1 KB (153 words) - 20:42, 19 August 2024
  • Thumbnail for ADALINE
    the Heaviside function (see figure), but the standard perceptron unit weights are adjusted to match the correct output, after applying the Heaviside function...
    10 KB (1,186 words) - 18:39, 23 May 2025
  • Thumbnail for Activation function
    )=U(a+\mathbf {v} '\mathbf {b} )} , where U {\displaystyle U} is the Heaviside step function. If a line has a positive slope, on the other hand, it may reflect...
    25 KB (1,960 words) - 05:35, 26 April 2025
  • Thumbnail for Heaviside cover-up method
    The Heaviside cover-up method, named after Oliver Heaviside, is a technique for quickly determining the coefficients when performing the partial-fraction...
    9 KB (1,732 words) - 08:16, 31 December 2024
  • Thumbnail for Boxcar function
    b] and H ( x ) {\displaystyle H(x)} is the Heaviside step function. As with most such discontinuous functions, there is a question of the value at the transition...
    2 KB (203 words) - 01:21, 15 November 2024
  • crater) Heaviside condition Heaviside cover-up method Heaviside layer or Kennelly–Heaviside layer Heaviside step function Heaviside's dolphin, named in honour...
    839 bytes (120 words) - 17:15, 21 February 2025
  • Thumbnail for Green's function
    the Heaviside step function, J ν ( z ) {\textstyle J_{\nu }(z)} is a Bessel function, I ν ( z ) {\textstyle I_{\nu }(z)} is a modified Bessel function of...
    43 KB (5,807 words) - 03:57, 7 June 2025
  • Thumbnail for Sigmoid function
    function – Function returning minus 1, zero or plus 1 Heaviside step function – Indicator function of positive numbers Logistic regression – Statistical...
    16 KB (2,095 words) - 11:52, 24 May 2025
  • to some subset. Step function: A finite linear combination of indicator functions of half-open intervals. Heaviside step function: 0 for negative arguments...
    10 KB (1,065 words) - 21:59, 6 March 2025
  • Thumbnail for Fourier transform
    takes a function as input then outputs another function that describes the extent to which various frequencies are present in the original function. The...
    177 KB (21,313 words) - 02:31, 2 June 2025
  • separable data. A perceptron traditionally used a Heaviside step function as its nonlinear activation function. However, the backpropagation algorithm requires...
    16 KB (1,932 words) - 18:15, 12 May 2025
  • Thumbnail for Error function
    functions occur, for example, in solutions of the heat equation when boundary conditions are given by the Heaviside step function. The error function...
    47 KB (7,328 words) - 08:39, 27 April 2025
  • Thumbnail for Logistic function
    (with scaling) is a smooth approximation of the Heaviside step function. The standard logistic function is analytic on the whole real line since f : R...
    56 KB (8,069 words) - 23:47, 14 June 2025
  • Thumbnail for Closed graph theorem
    basic results characterizing continuous functions in terms of their graphs. Each gives conditions when functions with closed graphs are necessarily continuous...
    11 KB (1,926 words) - 14:25, 31 March 2025
  • f(t)=f_{0}\theta (-t),} where θ ( t ) {\displaystyle \theta (t)} is the Heaviside function. We can express the expectation value of x by the probability distribution...
    30 KB (4,508 words) - 10:15, 8 June 2025
  • piecewise constant function Boxcar function, Heaviside step function Sign function Triangular function An approximation to a known curve can be found...
    10 KB (1,211 words) - 10:47, 27 May 2025
  • Thumbnail for Sellmeier equation
    evaluated, this gives the following, where H {\displaystyle H} is the Heaviside function: n 2 = 1 + 2 π ∑ i A i ∫ 0 ∞ δ ( ω − ω i ) ω ω 2 − Ω 2 d ω = 1 + 2...
    10 KB (1,233 words) - 02:40, 8 May 2025
  • _{2}}} By solving the Black–Scholes differential equation with the Heaviside function as a boundary condition, one ends up with the pricing of options that...
    65 KB (9,560 words) - 05:29, 30 May 2025
  • Thumbnail for Ramp function
    of the Heaviside step function with itself: R ( x ) := H ( x ) ∗ H ( x ) {\displaystyle R\left(x\right):=H(x)*H(x)} The integral of the Heaviside step function:...
    7 KB (1,005 words) - 03:45, 8 August 2024
  • that the sinc function is continuous function on all real numbers. An example of a discontinuous function is the Heaviside step function H {\displaystyle...
    63 KB (9,309 words) - 11:22, 27 May 2025
  • mathematical than physical, the unit function more physical than mathematical. The operator p in the Heaviside calculus initially is to represent the...
    16 KB (1,733 words) - 00:14, 11 May 2025
  • they make the "Jellicle choice" by deciding which cat will ascend to the Heaviside Layer and come back to a new life. As of 2024, Cats remains the fifth-longest-running...
    240 KB (22,149 words) - 19:28, 2 June 2025