Which statement is correct? The complexity of these systems makes them difficult to simulate on computers. The complexity of these systems makes it difficult to simulate them on computers. ...
When is it a good time to call you? When is a good time to call you? Everybody tells me that both are correct. What is the exact grammatical difference?
In a book I am reading there is a sentence: Our initial version of Cauchy's theorem begins with the observation that it suffices that f(z) [a function] have a primitive in a region Ω In ...
I know the use of "existential it" is frowned upon, but I'm not entirely sure how to rephrase the following sentence to remove it: It is hard to tell what would have occurred if the battle had ...