Two men are credited with inventing calculus..........one was Issac Newton................British.........the other a German.............and they did so concurrently...................

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   Calculus, known in its early history as infinitesimal calculus, is a mathematical discipline focused on limits, functions, derivatives, integrals, and infinite series.Isaac Newton and Gottfried Leibniz independently invented calculus in the mid-17th century.

   History of calculus - Wikipedia, the free encyclopedia

   https://en.wikipedia.org/wiki/History_of_calculus

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History of calculus - Wikipedia, the free encyclopedia

https://en.wikipedia.org/wiki/History_of_calculus

Wikipedia

Calculus, known in its early history as infinitesimal calculus, is a mathematical discipline focused on limits, functions, derivatives, integrals, and infinite series. Isaac Newton and Gottfried Leibniz independently invented calculus in the mid-17th century.

‎Precursors of calculus - ‎Pioneers of modern calculus - ‎Newton and Leibniz

Leibniz–Newton calculus controversy - Wikipedia, the free ...

https://en.wikipedia.org/.../Leibniz–Newton_calculus_controve...

Wikipedia

The calculus controversy (often referred to with the German term Prioritätsstreit, meaning 'priority dispute') was an argument between 17th-century mathematicians Isaac Newton and Gottfried Leibniz (begun or fomented in part by their disciples and associates) over who had first invented the mathematical study of change ...