I am as surprised as anyone to be this near the end of the All 2020 A-to-Z. But, also, I am hoping to stockpile a couple of essays for the first weeks of November. I expect that to be an even more emotionally trying time and would like to have as little work, even fun work like this, as possible then.

So please, in comments, suggest mathematical terms starting with the letters S, T, or U, or that can be reasonably phrased as something with those letters. Also please list any blogs, YouTube channels, books, anything that you’ve written or would like to see publicized.

I’m probably going to put out an appeal for the letter V soon, also, since that’s also scheduled for an early-November publication.

I am open to revisiting topics I looked at in the past, if I think I can do better, or can cover a different aspect of them. So for reference, the topics I’ve already covered starting with the letter ‘S’ were:

**Step**(2015)**Surjective Map**(Leap Day 2016)**Smooth**(End 2016)**Sárközy’s Theorem**(2017)**Sorites Paradox**(2018)**Sample Space**(2019)

Topics I’ve already covered, starting with the letter ‘T’, are:

**Tensor**(2015)**Transcendental Number**(Leap Day 2016)**Tree**(End 2016)**Topology**(2017)**Tiling**(2018)**Taylor Series**(2019)

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

**Unbounded**(2015)**Uncountable**(Leap Day 2016)**Unlink**(End 2016)**Ulam’s Spiral**(2017)**Unit Fraction**(2018)**Unitizing**(2019)

Thanks for reading, and for all your thoughts.

S: Statistics

T: Talent (Mathematical talent)

U: Unitary matrix / unitary group

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Good thoughts! Thank you.

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