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A comment on What every physicist should know about string theory. Parent comment

Re:What every physicist should know about string theory by whatshisface on Monday February 11, 2019 @10:38PM (#19140815)
Ok, let me guess without looking it up... A diffeomorphism is a smooth map that lets you switch coordinate systems.

(I sure hope that's not wrong.)

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Re:What every physicist should know about string theory by auntienomen on Monday February 11, 2019 @11:07PM (#19140968)
Pretty close. It's a smooth map with smooth inverse. If you've chosen chosen coordinates, it will transform them for you.

I think most physicists probably have a reasonable intuitive idea what a diffeomorphism is, since most have probably learned something about relativity.

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