Leibniz developed closely analogous concepts and techniques.
莱布尼茨发展了类似的概念和技术。
Researchers have, however, recently discovered notes of Leibniz' that discuss one of Newton's books on mathematics.
然而,研究人员最近发现莱布尼茨的笔记中讨论了牛顿的一本数学著作。
Leibniz' notes are limited to early sections of Newton's book, sections that precede the ones in which Newton's calculus concepts and techniques are presented.