Issac Newton technically "won" because in school we are taught the he discovered calculus, not Leibnitz. But because Newton's notation was so difficult we use Leibnitz's notation. In school though, you are not told that you are using Newton's findings with Lebinitz's notation.
Isaac Newton and Gottfried Wilhelm Leibniz
Calculus was invented independently by Isaac Newton and Gottfried Leibnitz. Newton did it first and showed the actual usefulness of the discipline by deriving the Law of gravity from astronomical data. Leibnitz however developed a much superior notation and terminology, thus it is actually Leibnitz's calculus that we use today.
Isaac Newton and Gottfried Leibniz.
Gottfried Wilhelm Leibniz
both were the mathematician who develop the finite intgral method
Gottfried Wilhelm Leibniz
In mathematics, Isaac Newton was a co-inventor of calculus (with Gottfried Leibniz).
Not a theory, They discovered a branch of math called calculus.
Newton , along with Gottfried Leibnitz , is considered to be the co-inventor of (the) Calculus. He also made several other contributions to math such as in numerical analysis.
Gottfried Wilhelm Leibniz
Gottfried Liebniz and Isaac Newton are credited with co-developing the Calculus, based on work from Archimedes, Cavalieri, and others. But only Newton also studied gravity, and attempted to come up with a theory about how and why it worked.
Differential equations were invented separately by Isaac Newton and Gottfried Leibniz. This debate on who was the first one to invent it was argued by both Isaac and Gottfried until their death.