I am not an expert in SDEs (my background is machine learning) but if I wanted to dig more into the subject, this is where I personally would start. Code [1] and pdf [2] for the book are available.
Simo Särkkä and Arno Solin (2019). Applied Stochastic Differential Equations. Cambridge University Press. Cambridge, UK.
I recently read the Gregory Hays translation [1] and thought it was great. Meditations was Marcus Aurelius's "notes to self" and the Hays edition captures this informal nature. It makes for an easy and delightful read.
Most of these cities (e.g. Zheleznogorsk [1]) seem to have a stylized atom as part of their coat of arms. I wonder if it was common practice in the USSR to incorporate similar symbols into the coat of arms of other newly founded industrial cities?
I got my x220 refurb last spring for under $700. I love it -- very portable and the battery life is ~6-7 hours. I run Arch Linux [1] and haven't had any issues, so you should be good to go with Ubuntu.
http://www.memrise.com is another spaced repetition alternative to Anki. You'd need another tool to practice your grammar, but for vocab alone it works great.
For #1, the yy command will yank the entire line (including the newline). Try using y$, which will yank from the cursor to the end of the line (not including the newline).
Agreed. The pomodoro technique is great for keeping your breaks time-bound. I often just walk around the office for a few minutes and refill my water bottle, etc. Gives me a chance to stare at something else than a screen.