The controversy over the invention of calculus between Newton and Leibniz is still mired in deep conflict.

Calculus is a branch of mathematics that explores variables. The names of two mathematicians of Europe are usually discussed in the seventeenth century.  One of them is Sir Isaac Newton and the other is Godfried Leibniz but who is ahead of the two?  Who invented the outstanding method of calculus before? Although there is a lot of technical poin of views about this debate this. Newton had started with his analytical method of fluxions in the 1670s, while Leibniz had developed his theories in a range of letters and papers.

Newton followed the geometric approach in Principia, published in 1687. He has been working since the age of twenty-three. Newton published his edition by part in 1693 and full part in 1704. According to the publication, Newton lagged behind because Leibniz began working on the subject in 1674 and published the first research paper on calculus in 1684.

No matter what Newton writes in the Principia, the success of the invention of calculus is not explicitly discussed in any research paper.  Later, Newton's notation did not prevail, Leibniz's notation was adopted.  However, Leibniz cannot be considered as an inventor.  The charge against him was that he got the initial idea about calculus by looking at Newton's work.  Historians of science have also given some evidence about this.

There is evidence. On the other hand, correspondence showing that both Newton and Leibniz knew about each other's work.

Gottfried Wilhelm Leibniz

Newton had started with his analytical method of fluxions in the 1670s but moved away from this to focus on first and ultimate ratios, while Leibniz had developed his theories in a range of letters and papers. As Bertoloni Meli argues (1993), on one level, there was relatively little difference between the Leibnizian calculus and Newton’s analytical calculus, a view with which Guicciardini (1999) concurs, pointing out that both men had similar approaches to the existence of infinitesimals. However, Newton and Leibniz, the two opposition parties, they don’t think so much during the conflict. They tried to establish his dignity in any way. Newton's side was relatively strong by few learned mathematicians. Leibniz's side was weaker than his. This antagonism between the British Newton and the German Leibniz made the last few years of Leibniz's life bitter.

Sir Isaac Newton

But the most surprising thing was that at that time The Royal Society of England abandoned all neutrality and came down in support of Newton. When Leibniz sent a letter to the Society about his own success, the Society's authorities gave Newton the task of judging, considering, and reporting on it and then Newton put forward his own invention. Although the controversy over the discovery of calculus between Newton and Leibniz  is still mired in deep conflict.