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Green's theorem[′grēnz ‚thir·əm]
Under certain general conditions, an integral along a closed curve C involving the sum of functions P (x,y) and Q (x,y) is equal to a surface integral, over the region D enclosed by C, of the partial derivatives of P and Q; namely,
(TMRC) For any story, in any group of people there will be at least one person who has not heard the story. A refinement of the theorem states that there will be *exactly* one person (if there were more than one, it wouldn't be as bad to re-tell the story). The name of this theorem is a play on a fundamental theorem in calculus.