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Teaching (OTIS)

Olympiad

  •  For beginners
  •  Problems
  •  MOP
  •  ELMO
  •  USEMO

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plz learn code

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Publications

  •  EGMO book
  •  Napkin (v1.5)
  •  Course notes

Advice

  •  Mentors
  •  Quotes
  •  FAQ's

Contact

  •  Rec letters

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Contacting Evan

The two best ways to reach me are

  • by email to $\text{evan}\texttt{@}\text{evanchen}{.}\text{cc}$ for private inquiries;
  • via my personal Discord for math advice or questions (see below).

Although I do my best to respond to as much as I can, I admit that I am not able to respond to everything. (Also, my replies are often terse. Please don’t be offended if so; I am just trying to be efficient.)

Before any questions, you might want to skim some parts of the website to see if it’s already answered, e.g. coaching page, contest resource recommendations and the propoganda section FAQ.

About Discord#

If your inquiry is not private (for example, looking for advice on textbooks), you could consider asking questions on my personal Discord server rather than emailing it privately. There are a few benefits to doing so:

  • Anyone can answer the question, so you may get faster responses or multiple responses.
  • Anyone can see the answers provided, so it is more valuable to the community this way.
  • It is easier to go back-and-forth in real time over Discord than over email.

Some notes for emails#

Here are some hints:

  • Comments, thanks, or suggestions on my writing are always appreciated! This includes any typos you find, no matter how trivial.

  • Specific queries get faster and better responses. So “can you explain this line of your solution to USAMO 20XY/Z?” will usually be answered pretty swiftly. Conversely, “how do i geo” will get at best a link to the FAQ.

  • Proper syntax, English, capitalization, etc is appreciated. (I know some of you are not native English speakers, so I try to overlook this when I can.)

  • Please be patient. “Bumping” a message before I have found time to respond is likely to annoy me. I will not respond to a non-urgent message that is bumped after less than one day.

  • Don’t be too shy! I might sound scary here, but if you have a good reason for contacting me and do so politely, then I won’t mind. I am happy to help where I can.
    (Examples of good requests: specific math query, something I wrote is unclear, found a typo, follow-up questions, permission requests, questions on my past experiences, etc. I’m sure there’s more.)

  • In particular, there’s no need to send an email asking if you can ask a question. Just ask it.

Particular problems#

If you need help with an olympiad problem, you are better off asking on a forum like AOPS. (If you send me a problem, usually I will at least read it. If I have seen it before or can quickly see how to do it, I will generally be nice enough to write back and outline or link the solution. But otherwise I will likely be too embarrassed to admit I don’t have time to work on every problem that students send me, and simply archive your message.)

Either way, if you do ask about a math problem

  • Please state where the problem is from, and link it if possible.
  • Please describe what you’ve already tried on the problem.

Special instructions for advice#

If you are asking a question along the lines of “how do I improve at math contests”, it is helpful to include as much specific information as possible. This usually means mentioning examples of problems you could not solve. (To draw an analogy, when people ask for advice in StarCraft, they are usually required to link a few recent replays, so the advice-giver can watch how they play and point out mistakes.) It’s also helpful to talk about what you have already tried in terms of preparation.

If you are able to, please pick 3-20 examples of recent problems that you tried but could not solve. For each problem, reproduce the statement, and then describe your thought process and what you tried. This helps me understand how you think and where you are at.

This is an example of a well-thought question. It focuses on a specific topic, describes what the asker’s mindset is, names specific examples of problems and how the asker tried the problem, and mentions what resources the asker has already tried. Because of this, the replies are informative and targeted.

Tech help#

If you want to ask for tech support with LaTeX or Linux, there are a couple channels in my personal Discord where you might get responses. If you do have a question:

  • Try search engine first.
  • Always paste code as text (or pastebin, etc.); do not use screenshots.
  • For LaTeX always include a minimal working example.
  • For Linux, write what commands you typed and the output.

Updated Mon 11 Apr 2022, 00:54:24 UTC by 8d2b1b1d6ed9