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Get in touch.

The simplest way to reach us is email. Write to [email protected] and a person will read it. We usually reply within a few days, sooner for corrections and removal requests.

Corrections
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01
Corrections

Found a mistake?

Thank you. The quickest route is to select the wrong text on the page and press Suggest a fix, which sends us the exact sentence and the page it came from.

If you'd rather write, email [email protected] with the page address, the sentence, and what you think it should say. A link to a source helps a lot, but it isn't required.

02
Questions

A question about a topic or a page

Email [email protected]. We can't take on tutoring or homework, but if a page left you confused, that's worth knowing, and it often turns into a better page.

03
Removal

Content about you, or content you own

If a page quotes or describes your work and you'd like it changed or removed, or you believe something here infringes your copyright, email [email protected] with the page address and a short explanation. These requests are handled first.

04
Privacy

Data and cookies

The privacy policy covers what analytics and advertising may collect and how to opt out. For anything it doesn't answer, email [email protected] with "Privacy" in the subject.

05
Partnerships

Advertising, sponsorship and licensing

Email [email protected]. We don't sell links, sponsored posts or placements inside articles, so please skip those pitches. Questions about reusing a diagram or a simulator are welcome.

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