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  2. Littlewood's three principles of real analysis - Wikipedia

    en.wikipedia.org/wiki/Littlewood's_three...

    Littlewood stated the principles in his 1944 Lectures on the Theory of Functions [1] as: . There are three principles, roughly expressible in the following terms: Every set is nearly a finite sum of intervals; every function (of class L p) is nearly continuous; every convergent sequence of functions is nearly uniformly convergent.

  3. State formation - Wikipedia

    en.wikipedia.org/wiki/State_formation

    This theory suggests that the formation of states can be seen as a transition from roving bandits to stationary bandits, where the provision of public goods becomes beneficial not just for the subjects, but also for the rulers who wish to maximize their own wealth over a longer time frame. [80] Carneiro's circumscription theory

  4. Function approximation - Wikipedia

    en.wikipedia.org/wiki/Function_approximation

    Several progressively more accurate approximations of the step function. An asymmetrical Gaussian function fit to a noisy curve using regression.. In general, a function approximation problem asks us to select a function among a well-defined class [citation needed] [clarification needed] that closely matches ("approximates") a target function [citation needed] in a task-specific way.

  5. Quasilinear utility - Wikipedia

    en.wikipedia.org/wiki/Quasilinear_utility

    where is an arbitrary function. [3] In the case of two goods this function could be, for example, u ( x , y ) = x + y . {\displaystyle u\left(x,y\right)=x+{\sqrt {y}}.} The quasilinear form is special in that the demand functions for all but one of the consumption goods depend only on the prices and not on the income.

  6. Approximately continuous function - Wikipedia

    en.wikipedia.org/wiki/Approximately_continuous...

    A fundamental result in the theory of approximately continuous functions is derived from Lusin's theorem, which states that every measurable function is approximately continuous at almost every point of its domain. [4] The concept of approximate continuity can be extended beyond measurable functions to arbitrary functions between metric spaces.

  7. Riemann mapping theorem - Wikipedia

    en.wikipedia.org/wiki/Riemann_mapping_theorem

    He proved the existence of Green's function on arbitrary simply connected domains other than itself; this established the Riemann mapping theorem. [3] Constantin Carathéodory gave another proof of the theorem in 1912, which was the first to rely purely on the methods of function theory rather than potential theory. [4]

  8. More than 800 people have lost their lives in jail since July 13, 2015 but few details are publicly released. Huffington Post is compiling a database of every person who died until July 13, 2016 to shed light on how they passed.

  9. Spectral theory of ordinary differential equations - Wikipedia

    en.wikipedia.org/wiki/Spectral_theory_of...

    For an arbitrary function f define (,) = (()) (). f(x, λ) may be regarded as a differentiable map into the space of functions of bounded variation ρ; or equivalently as a differentiable map () into the Banach space E of bounded linear functionals dρ on C[α,β] whenever [α, β] is a compact subinterval of [1, ∞).