If something here is wrong, unclear, or missing — please tell me.
This site is written by one person, and it will contain errors. Corrections are genuinely welcome, and they get made.
Most useful things to write about
A mistake
A wrong sign, a formula that does not work, an answer that does not check out. Please name the article and the section if you can — it makes the fix much faster.
Something that did not make sense
This is the most valuable message I can receive and the one people are least likely to send. If an explanation lost you, that is information I have no other way of getting. You do not need to know why it lost you — saying where is enough.
A topic you were looking for and did not find
Useful for deciding what to write next.
I read everything that comes in, but this is written alongside other work, so replies may take a while. Corrections are acted on whether or not I manage to write back.
One thing I cannot do is answer individual homework or doubt-solving questions. There are too many, and it would come at the cost of writing the material itself.