Dear collegues, I am writing an overview paper for an academic journal, where I also need to state theorems proved by other authors. Usually I cite the source and then rephrase the theorem. However in a few cases rephrasing seems counterproductive and the optimal formulation was already given by the author. Is it OK to refer to the original author and then give say a 2 lines long theorem verbatim? Can this be considered as a ``weak" form of plagiarism? Thank you for your answers. 



proper quoting of theorems
Depending on the style of your exposition, one possibility for distinguishing rephrased from verbatim results might be to say something along the lines of "In [reference], So-and-So proved a theorem that can be stated as follows: ..." on the one hand, and "In [reference], So-and-So stated and proved the following theorem: ..." on the other.


