List of topics named after Leonhard Euler

In mathematics and physics, many topics are named in honor of Swiss mathematician Leonhard Euler (1707–1783), who made many important discoveries and innovations.

Many of these items named after Euler include their own unique function, equation, formula, identity, number (single or sequence), or other mathematical entity.

Euler's work touched upon so many fields that he is often the earliest written reference on a given matter.

In an effort to avoid naming everything after Euler, some discoveries and theorems are attributed to the first person to have proved them after Euler.

Otherwise, Euler's equation may refer to a non-differential equation, as in these three cases: Selected topics from above, grouped by subject, and additional topics from the fields of music and physical systems