Maths in the library

I spent most of today solving differential equations and trying to see how others had been produced using the variables present. I'm starting to get back into understanding maths - I found the two textbooks I used during A level and worked through those which was exciting. The issue is that I have so so much to read through, and it is taking much longer than expected. My supervisor doesn't seem too worried though, so I think I just need to keep plowing through it. With the weekend off to go to canoe's alumni weekend, of course. 

I'm also wondering whether to pay blipfoto membership or stay a free member. I definitely won't be giving any money until my funding company pays me at the end of the month anyway!