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  2. Geometric progression - Wikipedia

    en.wikipedia.org/wiki/Geometric_progression

    Diagram illustrating three basic geometric sequences of the pattern 1(r n−1) up to 6 iterations deep.The first block is a unit block and the dashed line represents the infinite sum of the sequence, a number that it will forever approach but never touch: 2, 3/2, and 4/3 respectively.

  3. Tak (function) - Wikipedia

    en.wikipedia.org/wiki/Tak_(function)

    John McCarthy named this function tak() after Takeuchi. [5] However, in certain later references, the y somehow got turned into the z. This is a small, but significant difference because the original version benefits significantly from lazy evaluation. Though written in exactly the same manner as others, the Haskell code below runs much faster.

  4. Ddakji - Wikipedia

    en.wikipedia.org/wiki/Ddakji

    Ddakji are usually made by folding thick paper into a square, rectangular, or round shape. [1] [4] Other shapes are also possible, including hexagons and pentagons. [2]They can be made of various materials, often whatever disposable and foldable materials are immediately available to the players. [4]

  5. Taylor series - Wikipedia

    en.wikipedia.org/wiki/Taylor_series

    The Taylor series of any polynomial is the polynomial itself.. The Maclaurin series of ⁠ 1 / 1 − x ⁠ is the geometric series + + + +. So, by substituting x for 1 − x, the Taylor series of ⁠ 1 / x ⁠ at a = 1 is

  6. Riemannian geometry - Wikipedia

    en.wikipedia.org/wiki/Riemannian_geometry

    Riemannian geometry is the branch of differential geometry that studies Riemannian manifolds, defined as smooth manifolds with a Riemannian metric (an inner product on the tangent space at each point that varies smoothly from point to point).

  7. JJ - highline.huffingtonpost.com

    highline.huffingtonpost.com/miracleindustry/...

    -At a sales meeting in Boston which was addressing finances I committed10 tak.ing backthis GrantRequestsince noone waswilling to champion this program and pay forit-On or about September20I resubmitted the paperwork to you with a verbal explainatioh.-Amonth later you requested further documentation.

  8. Tetrahedral molecular geometry - Wikipedia

    en.wikipedia.org/wiki/Tetrahedral_molecular_geometry

    In a tetrahedral molecular geometry, a central atom is located at the center with four substituents that are located at the corners of a tetrahedron.The bond angles are arccos(− ⁠ 1 / 3 ⁠) = 109.4712206...° ≈ 109.5° when all four substituents are the same, as in methane (CH 4) [1] [2] as well as its heavier analogues.

  9. Proof that π is irrational - Wikipedia

    en.wikipedia.org/wiki/Proof_that_π_is_irrational

    In the 1760s, Johann Heinrich Lambert was the first to prove that the number π is irrational, meaning it cannot be expressed as a fraction /, where and are both integers. ...