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  2. Cone - Wikipedia

    en.wikipedia.org/wiki/Cone

    In the case of lines, the cone extends infinitely far in both directions from the apex, in which case it is sometimes called a double cone. Either half of a double cone on one side of the apex is called a nappe. The axis of a cone is the straight line passing through the apex about which the base (and the whole cone) has a circular symmetry.

  3. Convex cone - Wikipedia

    en.wikipedia.org/wiki/Convex_cone

    A cone is a convex cone if + belongs to , for any positive scalars , , and any , in . [5] [6] A cone is convex if and only if +.This concept is meaningful for any vector space that allows the concept of "positive" scalar, such as spaces over the rational, algebraic, or (more commonly) the real numbers.

  4. Conic section - Wikipedia

    en.wikipedia.org/wiki/Conic_section

    A conic is the curve obtained as the intersection of a plane, called the cutting plane, with the surface of a double cone (a cone with two nappes).It is usually assumed that the cone is a right circular cone for the purpose of easy description, but this is not required; any double cone with some circular cross-section will suffice.

  5. List of formulae involving π - Wikipedia

    en.wikipedia.org/wiki/List_of_formulae_involving_π

    More formulas of this nature can be given, as explained by Ramanujan's theory of elliptic functions to alternative bases. Perhaps the most notable hypergeometric inversions are the following two examples, involving the Ramanujan tau function τ {\displaystyle \tau } and the Fourier coefficients j {\displaystyle \mathrm {j} } of the J-invariant ...

  6. Cone (topology) - Wikipedia

    en.wikipedia.org/wiki/Cone_(topology)

    The cone over a closed interval I of the real line is a filled-in triangle (with one of the edges being I), otherwise known as a 2-simplex (see the final example). The cone over a polygon P is a pyramid with base P. The cone over a disk is the solid cone of classical geometry (hence the concept's name). The cone over a circle given by

  7. 5 of the McCallister Kids From “Home Alone” Reunite For the ...

    www.aol.com/lifestyle/5-mccallister-kids-home...

    Though legions of fans might revisit 1990’s Home Alone (and 1992’s Home Alone 2: Lost in New York) every year, the fictional McCallister kids haven’t gotten back together in thirty years ...

  8. Frustum - Wikipedia

    en.wikipedia.org/wiki/Frustum

    The viewing frustum in 3D computer graphics is a virtual photographic or video camera's usable field of view modeled as a pyramidal frustum. In the English translation of Stanislaw Lem 's short-story collection The Cyberiad , the poem Love and tensor algebra claims that "every frustum longs to be a cone".

  9. Shop Great Nordstrom Sales, Deals and Specials - AOL.com

    www.aol.com/shopping/stores/nordstrom

    Read the full story. Advertisement. The 20 best sales this weekend: Candy for stockings, wool sweaters, kid's PJs and more. 30 thoughtful gifts for people with anxiety for stress relief and self-care.