"infinitesimal analysis" meaning in English

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          "ref": "1816, John Playfair, Dissertation on the Progress of Mathematical and Physical Science since the Revival of Letters in Europe",
          "text": "Of the new or infinitesimal analysis, we are to consider Sir Isaac Newton as the first inventor, Leibnitz, a German philosopher, as the second; ...",
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        "(archaic, calculus) calculus"
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        {
          "text": "1998, John L. Bell, A Primer of Infinitesimal Analysis.:",
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          "text": "2002, E.I. Gordon, A.G. Kusraev, S.S. Kutateladze, Infinitesimal Analysis:",
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        "a systematic employment of infinitesimals that reduces calculus to algebra; nonstandard analysis."
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        "(mathematics, mathematical analysis) a systematic employment of infinitesimals that reduces calculus to algebra; nonstandard analysis."
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  "word": "infinitesimal analysis"
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        "calculus"
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        "a systematic employment of infinitesimals that reduces calculus to algebra; nonstandard analysis."
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        "(mathematics, mathematical analysis) a systematic employment of infinitesimals that reduces calculus to algebra; nonstandard analysis."
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