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William Tutte apparently introduced the concept of the thickness of a graph. I have a memory of reading or being told that the concept of the coarseness of a graph arose because Paul Erdos misunderstood the definition of thickness.


There was indeed a great deal of pushback to the New Math. You can find a brief summary of this on pp. 12-16 of my textbook, from which I will quote liberally: To say that these curricula were ambitious would be a dramatic understatement. Inspired by the mathematicians of the Bourbaki movement, New Math curricula stressed mathematical structures as a key ...

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