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  2. Discontinuities of monotone functions - Wikipedia

    en.wikipedia.org/wiki/Discontinuities_of...

    Let be a real-valued monotone function defined on an interval. Then the set of discontinuities of the first kind is at most countable.. One can prove [5] [3] that all points of discontinuity of a monotone real-valued function defined on an interval are jump discontinuities and hence, by our definition, of the first kind.

  3. Helly's selection theorem - Wikipedia

    en.wikipedia.org/wiki/Helly's_selection_theorem

    Let X be a reflexive, separable Hilbert space and let E be a closed, convex subset of X. Let Δ : X → [0, +∞) be positive-definite and homogeneous of degree one. Suppose that z n is a uniformly bounded sequence in BV([0, T]; X) with z n (t) ∈ E for all n ∈ N and t ∈ [0, T].

  4. Classification of discontinuities - Wikipedia

    en.wikipedia.org/wiki/Classification_of...

    The function in example 1, a removable discontinuity. Consider the piecewise function = {< = >. The point = is a removable discontinuity.For this kind of discontinuity: The one-sided limit from the negative direction: = and the one-sided limit from the positive direction: + = + at both exist, are finite, and are equal to = = +.

  5. Lindelöf's lemma - Wikipedia

    en.wikipedia.org/wiki/Lindelöf's_lemma

    Let be a countable basis of .Consider an open cover, =.To get prepared for the following deduction, we define two sets for convenience, := {:}, ′:=. A straight-forward but essential observation is that, = which is from the definition of base. [1]

  6. List of forcing notions - Wikipedia

    en.wikipedia.org/wiki/List_of_forcing_notions

    In Cohen forcing (named after Paul Cohen) P is the set of functions from a finite subset of ω 2 × ω to {0,1} and p < q if p ⊇ q. This poset satisfies the countable chain condition. Forcing with this poset adds ω 2 distinct reals to the model; this was the poset used by Cohen in his original proof of the independence of the continuum ...

  7. No. 1 Oregon keeps No. 3 Penn State at bay in 45-37 Big Ten ...

    www.aol.com/sports/no-1-oregon-keeps-no...

    The No. 1 Ducks assured themselves of the top spot in the 12-team field with a 45-37 win over No. 3 Penn State in the Big Ten title game on Saturday night. The Ducks (13-0) were powered by a ...

  8. The Most Popular Baby Boy Names of 2025 Are Really ... - AOL

    www.aol.com/most-popular-baby-boy-names...

    Cowboy Names Go Next-Level. Call it the Yellowstone effect. "One of the biggest trends we’ll see for baby boy names in 2025 are 'Country Rebrand' names," says Sophie Kihm, editor-in-chief of ...

  9. Radon measure - Wikipedia

    en.wikipedia.org/wiki/Radon_measure

    The measure which equals 1 on any Borel set that contains an uncountable closed subset of [1, Ω), and 0 otherwise, is Borel but not Radon, as the one-point set {Ω} has measure zero but any open neighbourhood of it has measure 1. [6] Let X be the interval [0, 1) equipped with the topology generated by the collection of half open intervals {[a ...

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