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This section contains topic summaries only. The purpose is to provide a quick reference, an outline or summary of key concepts - a sort of refresher for memory for a topic already known.
"One had to cram all this stuff into one's mind for the examinations, whether one liked it or not. This coercion had such a deterring effect on me that, after I had passed the final examination, I found the consideration of any scientific problems distasteful to me for an entire year."
[Albert Einstein]