To be honest the material was really easy, simply because we already went over most of it on Monday. The most difficult part though is simply thinking that something can be a subset of something else but still retain the same cardinality. Weird things happen at infinity.
The most interesting part of the reading was of course the square type function used to count the ordered pairs. I wonder who came up with that and if there is a way to express the function whiteout simply showing a pattern.
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