the modified dirichlet function (1/q if x is rational = p/q, 0 if x is irrational) is integrable. How is it integrable? What is the upper step function?(adsbygoogle = window.adsbygoogle || []).push({});

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Dirichlet function

**Physics Forums | Science Articles, Homework Help, Discussion**