Explore relationships

Euler function

In mathematics, the Euler function is given by ϕ(q)=∏k=1∞(1−qk),|q|<1.{\displaystyle \phi (q)=\prod _{k=1}^{\infty }(1-q^{k}),\quad |q|<1.}Named after Leonhard Euler, it is a model example of a q-series and provides the prototypical example of a relation between combinatorics and complex analysis.

Use + to expand a branch. Click a topic name to open its summary.