I have reached the halfway point in this year’s A-to-Z! Not in the number of essays written — this week I should hit the 10th — but in preparing for topics? We are almost halfway done.

So for this, as with any A-to-Z essay, I’d like to know some mathematical term starting with the letters M, N, or O that you would like to see me write about. While I reserve the right to talk about anything I do care, I usually will pick the nominated topic I think I can be most interesting about. Or that I want to hurriedly learn something about. Please put in a comment with whatever you’d like me to discuss. And, please, if you do suggest something let me know how to credit you, and of any project that you do that I can mention. This project may be a way for me to show off, but I’d like everybody to have a bit more attention.

Topics I’ve already covered, starting with the letter ‘M’, are:

**Measure**(2015)**Matrix**(Leap Day 2016)**Monster Group**(End 2016)**Morse Theory**(2017)**Manifold**(2018)**Martingales**(2019)

Topics I’ve already covered, starting with the letter ‘N’, are:

**N-tuple**(2015)**Normal Subgroup**(Leap Day 2016)**Normal Numbers**(End 2016)**N-Sphere/N-Ball**(2017)**Nearest-Neighbor Model**(2018)**Norm**(2019)

Topics I’ve already covered, starting with the letter ‘O’, are:

**Orthogonal**(2015)**Orthonormal**(Leap Day 2016)**Osculating Circle**(End 2016)**Open Set**(2017)**Oriented Graph**(2018)**Operator**(2019)

Thank you all for what you nominate. Also for thinking about nominations; I appreciate the work you do for me.

All of this year’s A-to-Z essays should be at this link. And all of the A-to-Z essays, from all years, should be at this link. Thanks for reading.

M: minimax/maximin

N: Neumann (John von)

O: Big O or little O notation

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Great topic thoughts! Thank you.

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“Magic Square” and “Möbius Strip” come to mind as fun M-topics. “Minimal Surface” might be a little weightier, but also a fascinating topic.

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I like these all, yeah. Thank you.

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