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  2. Proof that 22/7 exceeds π - Wikipedia

    en.wikipedia.org/wiki/Proof_that_22/7_exceeds_π

    Proofs of the mathematical result that the rational number ⁠ 22 / 7 ⁠ is greater than π (pi) date back to antiquity. One of these proofs, more recently developed but requiring only elementary techniques from calculus, has attracted attention in modern mathematics due to its mathematical elegance and its connections to the theory of Diophantine approximations.

  3. Approximations of π - Wikipedia

    en.wikipedia.org/wiki/Approximations_of_π

    Super PI by Kanada Laboratory [102] in the University of Tokyo is the program for Microsoft Windows for runs from 16,000 to 33,550,000 digits. It can compute one million digits in 40 minutes, two million digits in 90 minutes and four million digits in 220 minutes on a Pentium 90 MHz. Super PI version 1.9 is available from Super PI 1.9 page.

  4. Pi bond - Wikipedia

    en.wikipedia.org/wiki/Pi_bond

    A typical triple bond, for example in acetylene (HC≡CH), consists of one sigma bond and two pi bonds in two mutually perpendicular planes containing the bond axis. Two pi bonds are the maximum that can exist between a given pair of atoms. Quadruple bonds are extremely rare and can be formed only between transition metal atoms, and consist of ...

  5. Milü - Wikipedia

    en.wikipedia.org/wiki/Milü

    Using Liu Hui's algorithm (which is based on the areas of regular polygons approximating a circle), Zu famously computed π to be between 3.1415926 and 3.1415927 [a] and gave two rational approximations of π, ⁠ 22 / 7 ⁠ and ⁠ 355 / 113 ⁠, naming them respectively Yuelü (Chinese: 约率; pinyin: yuēlǜ; "approximate ratio") and Milü. [1]

  6. Sigma bond - Wikipedia

    en.wikipedia.org/wiki/Sigma_bond

    When viewed down the bond axis, a σ MO has a circular symmetry, hence resembling a similarly sounding "s" atomic orbital. Typically, a single bond is a sigma bond while a multiple bond is composed of one sigma bond together with pi or other bonds. A double bond has one sigma plus one pi bond, and a triple bond has one sigma plus two pi bonds

  7. Stocks vs. bonds: Which is a better choice for you? - AOL

    www.aol.com/finance/stocks-vs-bonds-better...

    On the other hand, bonds and other short-term fixed income securities tend to be a better option for short-term goals because they are typically less volatile than stocks and can help generate ...

  8. TLT vs. Shorter-Duration Bond ETFs: Which Should You ... - AOL

    www.aol.com/tlt-vs-shorter-duration-bond...

    Indeed, bonds aren’t an exhilarating asset class. Whenever you hear about action in the bond market, it’s often about how it’ll affect the stock market. At the end of the day, it’s stocks ...

  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. ...