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  2. Numeric precision in Microsoft Excel - Wikipedia

    en.wikipedia.org/wiki/Numeric_precision_in...

    Excel graph of the difference between two evaluations of the smallest root of a quadratic: direct evaluation using the quadratic formula (accurate at smaller b) and an approximation for widely spaced roots (accurate for larger b). The difference reaches a minimum at the large dots, and round-off causes squiggles in the curves beyond this minimum.

  3. Formula editor - Wikipedia

    en.wikipedia.org/wiki/Formula_editor

    A formula editor is a computer program that is used to typeset mathematical formulas and mathematical expressions. Formula editors typically serve two purposes: They allow word processing and publication of technical content either for print publication, or to generate raster images for web pages or screen presentations.

  4. Fisher's exact test - Wikipedia

    en.wikipedia.org/wiki/Fisher's_exact_test

    Thus, we can calculate the exact probability of any arrangement of the 24 teenagers into the four cells of the table, but Fisher showed that to generate a significance level, we need consider only the cases where the marginal totals are the same as in the observed table, and among those, only the cases where the arrangement is as extreme as the ...

  5. 1990s - Wikipedia

    en.wikipedia.org/wiki/1990s

    Cell phones of the early-1990s and earlier ones were very large, lacked extra features, and were used by only a few percent of the population of even the advanced nations. Only a few million people used online services in 1990, and the World Wide Web , which would have a significant impact on technology for many decades, had only just been ...

  6. Criticism of the Quran - Wikipedia

    en.wikipedia.org/wiki/Criticism_of_the_Quran

    Another, their father, was the one who drank the gall and the vinegar; it was not I. Another was the one who lifted up the cross on his shoulder, who was Simon. Another was the one on whom they put the crown of thorns.

  7. Closed and exact differential forms - Wikipedia

    en.wikipedia.org/wiki/Closed_and_exact...

    In mathematics, especially vector calculus and differential topology, a closed form is a differential form α whose exterior derivative is zero (dα = 0), and an exact form is a differential form, α, that is the exterior derivative of another differential form β. Thus, an exact form is in the image of d, and a closed form is in the kernel of d.

  8. Timeline of United States inventions (before 1890) - Wikipedia

    en.wikipedia.org/wiki/Timeline_of_United_States...

    1883 Solar cell. Solar panels at Nellis Air Force Base in Nevada generating and absorbing the sun's natural light. A solar cell is any device that directly converts the energy in light into electrical energy through the process of photovoltaics.

  9. Copy Exactly! - Wikipedia

    en.wikipedia.org/wiki/Copy_Exactly!

    Copy Exactly! is a factory strategy model developed by the computer chip manufacturer, Intel, to build new manufacturing facilities with high capacity practices already in place. [1] The Copy Exactly! model allows factories that successfully design and manufacture chips to be replicated in locations globally.