difference engine babbage - EAS

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  1. Charles Babbage around 1849

    The idea of the Difference Engine was thought of by Charles Babbage around 1849. Babbage was originally working on building the machine, however he kept finding better ways to construct it; because of this Babbage was never able to finish building the device himself.
    www.pages.drexel.edu/~rgj26/DEP.html
    www.pages.drexel.edu/~rgj26/DEP.html
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    Why did Charles Babbage invent the difference engine?
    Why did Charles Babbage invent the Difference Engine? Charles Babbage began to construct a small difference engine in c. 1819 and had completed it by 1822 (Difference Engine 0). The British government was interested, since producing tables was time-consuming and expensive and they hoped the difference engine would make the task more economical.
    www.rhumbarlv.com/did-charles-babbage-finish-the-differ…
    When did Babbage make the plans for the difference engine?
    The idea of mechanically calculating mathematical tables first came to Babbage in 1812 or 1813. Later he made a small calculator that could perform certain mathematical computations to eight decimals. Then in 1823 he obtained government support for the design of a projected machine, the Difference Engine, with a 20-decimal capacity.
    www.britannica.com/biography/Charles-Babbage
    What can Charles Babbage's Difference Engine do?
    Babbage's first attempt at a mechanical computing device, the Difference Engine, was a special-purpose machine designed to tabulate logarithms and trigonometric functions by evaluating finite differences to create approximating polynomials.
    en.wikipedia.org/wiki/Babbage_engine#:~:text=Babbage%…
    How big was the difference engine?
    Difference Engine No. 1 is the first complete design for an automatic calculating engine. From time to time Babbage changed the capacity of the Engine. The 1830 design shows a machine calculating with sixteen digits and six orders of difference. The Engine called for some 25,000 parts shared equally between the calculating section and the printer.
    www.computerhistory.org/babbage/engines/
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    https://en.wikipedia.org/wiki/Difference_engine

    A difference engine is an automatic mechanical calculator designed to tabulate polynomial functions. It was designed in the 1820s, and was first created by Charles Babbage. The name, the difference engine, is derived from the method of divided differences, a way to interpolate or tabulate

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    The notion of a mechanical calculator for mathematical functions can be traced back to the Antikythera mechanism of the 2nd century BC, while early modern examples are attributed to Pascal and Leibniz in

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    The principle of a difference engine is Newton's method of divided differences. If the initial value of a polynomial (and of its finite differences) is calculated by some means for some value of X, the difference engine can calculate any number of nearby values, using the method

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    The difference engine consists of a number of columns, numbered from 1 to N. The machine is able to store one decimal number in each column. The machine can only add the value of a column n + 1 to column n to produce the new value of n. Column N

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    The initial values of columns can be calculated by first manually calculating N consecutive values of the function and by backtracking, i.e. calculating the required differences.

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  4. https://www.whipplemuseum.cam.ac.uk/explore...

    Charles Babbage's Difference Engine. Early calculating machines, despite their ingenuity, were more like intellectual playthings than essential aids. Most of the functions that had to be calculated for standard tables were far more …

  5. https://spectrum.ieee.org/charles-babbage-difference-engine

    May 27, 2022 · But Babbage, perhaps reinvigorated by his work on the Analytical Engine, decided to return to the Difference Engine in 1846. Difference Engine No. 2 required only 8,000 parts and had a much more elegant and efficient design. He estimated it would weigh 5 tons and measure 11 feet long and 7 feet high.

  6. https://www.computerhistory.org/babbage

    Charles Babbage and his Difference Engine #2 Charles Babbage (1791-1871), computer pioneer, designed the first automatic computing engines. He invented computers but failed to build them. The first complete Babbage Engine was …

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