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  2. Limit (mathematics) - Wikipedia

    en.wikipedia.org/wiki/Limit_(mathematics)

    In mathematics, a limit is the value that a function (or sequence) approaches as the argument (or index) approaches some value. [1] Limits of functions are essential to calculus and mathematical analysis, and are used to define continuity, derivatives, and integrals.

  3. Limit inferior and limit superior - Wikipedia

    en.wikipedia.org/wiki/Limit_inferior_and_limit...

    In mathematical analysis, limit superior and limit inferior are important tools for studying sequences of real numbers.Since the supremum and infimum of an unbounded set of real numbers may not exist (the reals are not a complete lattice), it is convenient to consider sequences in the affinely extended real number system: we add the positive and negative infinities to the real line to give the ...

  4. Cauchy–Hadamard theorem - Wikipedia

    en.wikipedia.org/wiki/Cauchy–Hadamard_theorem

    In mathematics, the Cauchy–Hadamard theorem is a result in complex analysis named after the French mathematicians Augustin Louis Cauchy and Jacques Hadamard, describing the radius of convergence of a power series.

  5. Central limit theorem - Wikipedia

    en.wikipedia.org/wiki/Central_limit_theorem

    In probability theory, the central limit theorem (CLT) states that, under appropriate conditions, the distribution of a normalized version of the sample mean converges to a standard normal distribution.

  6. Natural density - Wikipedia

    en.wikipedia.org/wiki/Natural_density

    A subset A of positive integers has natural density α if the proportion of elements of A among all natural numbers from 1 to n converges to α as n tends to infinity.. More explicitly, if one defines for any natural number n the counting function a(n) as the number of elements of A less than or equal to n, then the natural density of A being α exactly means that [1]

  7. COVID-19 pandemic in Vietnam - Wikipedia

    en.wikipedia.org/wiki/COVID-19_pandemic_in_Vietnam

    The COVID-19 pandemic in Vietnam has resulted in 11,624,000 [1] confirmed cases of COVID-19 and 43,206 [1] deaths. The number of confirmed cases is the highest total in Southeast Asia, and the 13th highest in the world.

  8. Tô Lâm - Wikipedia

    en.wikipedia.org/wiki/Tô_Lâm

    In April 2016, he was appointed Vice Chairman of the Central Steering Committee on Anti-corruption by President Tran Dai Quang, and in July of the same year, he was named Head of the Central Highlands Steering Committee. From 2016 to 2024, he held several key positions, including Minister of Public Security and Vice Chairman of the Central ...

  9. Lim, Bắc Ninh - Wikipedia

    en.wikipedia.org/wiki/Lim,_Bắc_Ninh

    Lim is a township (thị trấn) and capital of Tiên Du District, Bắc Ninh Province, Vietnam. [1] References This page was last edited on 3 January 2022, at 12:42 ...