Thank you for this in-depth video. Did you subtitle it yourself? Your English is amazing! It must have taken so much time to translate so many technical words. I’m Japanese but I’ve lived in Australia for my whole life and graduated a math degree being taught only in English. Personally it was very interesting for me to see the maths world in Japanese. I was kind of surprised you didn’t separate the categories to pure and applied. Thank you for your videos I’ve been enjoying them a lot during this stay at home period :)