Hi. I'm Simon Rubinstein-Salzedo. I'm a mathematics postdoc at Dartmouth College. I'm also a musician; I play piano and cello, and I also sometimes compose music and study musicology. I also like to play chess and write calligraphy. This blog is a catalogue of some of my thoughts. I write them down so that I understand them better. But sometimes other people find them interesting as well, so I happily share them with my small corner of the world.

## One Interesting Thing: The preponderance of 2-groups among finite groups

This is a preliminary discussion of my knowledge about 2-groups. There are still many questions I have, and I would appreciate any insights. When we first learn about group theory, we learn some theorems about how to decompose finite groups, … Continue reading

## One Interesting Thing: Homomorphic Encryption

I plan to start writing about one interesting thing I learn each week. This will serve two purposes: forcing me to think about interesting things, and also forcing me to write. Here is the first installment in the series. Suppose … Continue reading

## An experiment in imbalances

Ordinarily, when I play chess, I favor relatively balanced positions, in which the result of the game is more likely to hinge on positional ideas, rather than tactics. Hence, I do not sacrifice material often, unless I have calculated that … Continue reading

## On (Not) Learning Things

I have to learn new things constantly in order to keep myself entertained. I’m rarely interested in doing things that don’t allow me to learn, and when I look back at things I have done that don’t teach me anything, … Continue reading

Posted in education, truth | 4 Comments

## My most stressful game

This past weekend, I went to Burlington to play in the Vermont Open. I had a fairly good result, scoring 2 wins, 2 draws, and 1 loss. My most interesting, and also my most stressful, game was the one from … Continue reading

Posted in chess tournament | 1 Comment

## I shall have to be contented with a tulip or lily

I came to the Labor Day tournament this year full of high expectation. I’d just done a large overhaul of my openings and was feeling quite well-prepared. In my first game, I faced Philipp Perepelitsky, whom I had known since … Continue reading