Example image of eyePlorer eyePlorer map for 'Dirac delta function': Mathematics Paul Dirac 0 (number) Generalized function Integral Signal processing Function (mathematics) Distribution (mathematics) Measure (mathematics) Sequence Weak topology Graph of a function Real number Sinc function Almost everywhere If and only if Abstraction Electric charge Electron Mass Baseball Dynamics (physics) Force Motion (physics) Normal distribution Variance Augustin-Louis Cauchy Gustav Kirchhoff Siméon Denis Poisson Hermann von Helmholtz William Thomson, 1st Baron Kelvin Fourier series Oliver Heaviside Kronecker delta Heuristic Real analysis Lebesgue integration Absolute continuity Lebesgue measure Singular measure Radon–Nikodym theorem Abuse of notation Riemann integral Cumulative distribution function Heaviside step function Indicator function Riemann–Stieltjes integral Moment (mathematics) Characteristic function (probability theory) Smooth function