Contact

We would love to hear from you, whether you found a mistake, want a new topic or have a question about the site.

Report a mistake or suggest a topic

The quickest way to reach us is to open an issue on GitHub. Please include:

• the link to the page,
• what looks wrong or what you would like to see,
• for a wrong answer, the working that you think is correct.

You need a free GitHub account to open an issue.

Response time

We read every message and usually reply within a few days. Corrections to answers and code are given the highest priority.