At first glance, my week was pretty terrible: Our Balcony had to be closed because of imminent structural failure, resulting in a ton of additional work to get rid of all the planters and vegetables we had on it, and today our DSL modem died.

But all in all it still was a good week: At work, I felt more productive than for the past few months, I had the energy to actually deal with the stuff from the balcony (would’ve been impossible some weeks ago), my weird habit of keeping functional gear saved my Internet connection for now, and above all I still found some time and energy to dig into topics I wanted to check out for literal years and had a friend over for some cold drinks.

For mathematicians in Germany, this is known as the “Hedgehog Theorem” (“Satz vom Igel”, as in “you can’t fully comb a hedgehog”)