## Bernoulli

Ber·noul·li Family of Swiss mathematicians and scientists, including

**Jakob**or**Jacques**(1654–1705), an important developer of ordinary calculus and the calculus of variations. His brother**Johann**or**Jean**(1667–1748) developed the calculus of variations. Johann's son**Daniel**(1700–1782) anticipated the law of conservation of energy, did pioneering work in the molecular theory of gases, and contributed to probability theory and the theory of differential equations.