
 Writing mathematics 
  Mathematics is all about implications, statements of the form "assuming that X, we have Y", or "if X then Y", or "since X is true, Y must hold", or "because we know X, Y follows". 
  Equality means equality, 5 means 5, the Riemann integral is a Riemann integral whether the person reading what you wrote is a Romanian, a freemason, or a vegetarian. 
  This insistence on accuracy is not some type of malice, or the professor's way of having fun; mathematics simply cannot exist without the rigor of meaning exactly what you say, and your papers cannot be fairly judged in any other manner. 
 www.math.niu.edu /~behr/Teaching/writing.html (1061 words) 
