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  2. List of limits - Wikipedia

    en.wikipedia.org/wiki/List_of_limits

    If () for all x in an interval that contains c, except possibly c itself, and the limit of () and () both exist at c, then [5] () If lim x → c f ( x ) = lim x → c h ( x ) = L {\displaystyle \lim _{x\to c}f(x)=\lim _{x\to c}h(x)=L} and f ( x ) ≤ g ( x ) ≤ h ( x ) {\displaystyle f(x)\leq g(x)\leq h(x)} for all x in an open interval that ...

  3. Lebesgue differentiation theorem - Wikipedia

    en.wikipedia.org/wiki/Lebesgue_differentiation...

    The Vitali covering lemma is vital to the proof of this theorem; its role lies in proving the estimate for the Hardy–Littlewood maximal function.. The theorem also holds if balls are replaced, in the definition of the derivative, by families of sets with diameter tending to zero satisfying the Lebesgue's regularity condition, defined above as family of sets with bounded eccentricity.

  4. Limit inferior and limit superior - Wikipedia

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

    That is, xlim sup X n if and only if there exists a subsequence (X n k) of (X n) such that xX n k for all k. lim inf X n consists of elements of X which belong to X n for all except finitely many n (i.e., for cofinitely many n). That is, xlim inf X n if and only if there exists some m > 0 such that xX n for all n > m.

  5. Changhe Z-18 - Wikipedia

    en.wikipedia.org/wiki/Changhe_Z-18

    It also reportedly makes greater use of titanium and composites in its rotor blades and rotor, [4] and replaces the Z-8's boat-shaped lower fuselage with a tail ramp for small vehicles. [1] It has a glass cockpit [2] and is powered by three WZ-6C turboshafts. [2] [1] The Z-18's maximum takeoff weight (MTOW) is 13.8 tonnes.

  6. Sidi's generalized secant method - Wikipedia

    en.wikipedia.org/wiki/Sidi's_generalized_secant...

    The number k must be 1 or larger: k = 1, 2, 3, .... It remains fixed during the execution of the algorithm. It remains fixed during the execution of the algorithm. In order to obtain the starting approximations x 1 , … , x k + 1 {\displaystyle x_{1},\dots ,x_{k+1}} one could carry out a few initializing iterations with a lower value of k .

  7. Fatou's lemma - Wikipedia

    en.wikipedia.org/wiki/Fatou's_lemma

    This sequence converges uniformly on S to the zero function and the limit, 0, is reached in a finite number of steps: for every x ≥ 0, if n > x, then f n (x) = 0. However, every function f n has integral −1. Contrary to Fatou's lemma, this value is strictly less than the integral of the limit (0).

  8. Mitsubishi X-2 Shinshin - Wikipedia

    en.wikipedia.org/wiki/Mitsubishi_X-2_Shinshin

    The Mitsubishi X-2 Shinshin (三菱 X-2 心神, formerly the ATD-X) is a Japanese experimental aircraft for testing advanced stealth fighter aircraft technologies. It is being developed by the Japanese Ministry of Defense Technical Research and Development Institute (TRDI) for research purposes.

  9. Sommerfeld radiation condition - Wikipedia

    en.wikipedia.org/wiki/Sommerfeld_radiation_condition

    In applied mathematics, and theoretical physics, the Sommerfeld radiation condition is a concept from theory of differential equations and scattering theory used for choosing a particular solution to the Helmholtz equation.