My name is Alex Youcis, and I am a postdoc at the University of Toronto.
I started this blog mostly as a form of public note writing. Writing notes really helps me hammer concepts into my head. It also seems that with the hundreds of other notes I’ve taken advantage of in my mathematical lifetime, it would be nice to give back in kind.
If you ever mistakes in one of my posts, mathematical or otherwise, please let me know!
Hard Arithmetic 
Is “if you ever mistakes…” instead of “if you ever see any mistakes…” a deliberate mistake? It’s a common form of humour to make deliberate errors while discussing errors. For example, people say things like “My speling is exscellent!” Is that the type of humour you were aiming at?
Thank You,
Paul
Hey Paul,
No, that was not deliberate. 🙂 Now I’m not sure to fix it, or leave it hoping people will mistake it for wit!
This is a great blog!
Bravo! It’s a great idea to publish your notes in this fashion … even if I don’t understand a large fraction of them; which is why I guess you called them hard; this is more honest I think than calling them basic, elementary or foundational; I look forward to the even harder sequel ;).
Just out of curiosity, when did you begin your undergrad?
I graduated high school in 2009 and started undergrad the same year.