**关于此课程： **Discrete mathematics forms the mathematical foundation of computer and information science. It is also a fascinating subject in itself.
Learners will become familiar with a broad range of mathematical objects like sets, functions, relations, graphs, that are omnipresent in computer science. Perhaps more importantly, they will reach a certain level of mathematical maturity - being able to understand formal statements and their proofs; coming up with rigorous proofs themselves; and coming up with interesting results.
This course attempts to be rigorous without being overly formal. This means, for every concept we introduce we will show at least one interesting and non-trivial result and give a full proof. However, we will do so without too much formal notation, employing examples and figures whenever possible.
The main topics of this course are (1) sets, functions, relations, (2) enumerative combinatorics, (3) graph theory, (4) network flow and matchings. It does not cover modular arithmetic, algebra, and logic, since these topics have a slightly different flavor and because there are already several courses on Coursera specifically on these topics.

XZ

Actually I haven't finished course in the eleventh week yet, I've only done all the tests:). However, I'd like to say that I like this course very much, it's inspiring and difficult enough. Though I always have to struggle a lot to find the cocepts and meaning of the notations online, there have been enough hints. The only pity was that sometimes there's something which can't be shown normally in exercise, this has caused me some trouble. Overall it's great, and thanks a lot, professor Scheder.