xyquadrat.ch

I’ve bought myself a smart ceiling lamp a while ago (the Aqara T1M, to be precise) and set it up with Home Assistant.

Two years ago a friend of mine that worked as a math teacher reached out and asked how she could create visualizations of fractions similar to this example which is often found in school books: For the average person, this would not be easily doable.

I’ve bought a new homeserver last week and have been busy transferring my data and services from my old trusty Raspberry Pi to my new Dell Optiplex 3070.

To view files on the command line, you’ll likely want to use less.

The h-index is an easy-to-calculate metric that measures the impact of the publications of an author.

In my opinion, the default boxes you get with tcolorbox aren’t that good-looking: So I eventually decided to dive into the extensive documentation and make use of the myriad of config options to find something that looks cleaner.

Note: This is not an official resource.

This semester I’ve been teaching the course “Algorithms & Datastructures” at ETH for the first time as a Teaching Assistant.

Even more than a decade after its release, Minecraft continues to be popular and receives regular updates.

Zig is a lovely low-level language I’ve recently learned about, and what better way is there to learn a new language than to use it to solve Advent of Code problems.

If you have nginx as your reverse proxy of choice (like I do) and you for one reason or the other have to run PHP code on your website, you might have a configuration in your nginx config file like this: location ~ \.php$ { include /etc/nginx/snippets…

Fellow Polyring members: Do you have a blog, but you only have two or three posts?

Let us tackle the following problem: Give a two-thread history that is sequentially consistent, but not linearizable.

A good font choice is essential to a good-looking website. xyquadrat.ch surely wouldn’t look even remotely trustworthy if I used Comic Sans, would it?

Honestly that’s not a fully satisfactory solution; it’d be better to have a single parametrized widget that one could easily adapt to any design with a few simple arguments.

A webring?

Whilst RSA is considered secure if we use sufficiently large primes as an input, for very small primes, it is trivial to reverse the process and finde the private key if we are only given the public one.

If we have an algebra that is modulo some polynomial, say $\mathbb{Z}_5 [x]_{x^2 + 1}$, it often is the case that we perform some operation in this algebra and afterwards have to take our result modulo said polynomial, so modulo $x^2 + 1$ for example.

Continuing with Discrete Mathematics, we shall examine the following rather simple problem: Prove or disprove: $(\lbrace 1,3,6,9,12\rbrace, \mid)$ is a lattice.

Today, we’ll investigate the following exercise: Decide whether the given algebra is a ring, a field, or an integral domain (check all that apply).