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This is the place for discussing Chapter 3 of this book:
Chapter 3 is about databases - and now we will finally meet categories, functors, and universal constructions.
Lectures will start on Monday 28 May 2018. But you can start reading the book and doing exercises now!
Fredrick Eisele is putting some exercises onto this forum. Please try some and put up your answers! If one of them is not up yet at the following location, you can put it there.