Leonhard Euler

1707–1783 · Swiss mathematician, physicist, and engineer

Topics: mathematics

• For since the fabric of the universe is most perfect, and is the work of a most wise Creator, nothing whatsoever takes place in the universe in which some relation of maximum and minimum does not appear.

  — Leonhard Euler

• A function of a variable quantity is an analytic expression composed in any way whatsoever of the variable quantity and numbers or constant quantities.

  — Leonhard Euler

• The kind of knowledge which is supported only by observations and is not yet proved must be carefully distinguished from the truth; it is gained by induction, as we usually say. Yet we have seen cases in which mere induction led to error.

  — Leonhard Euler