I wrote the following line in LaTeX: $$a = b~iff~a \geq b~and a \leq b$$ I would like LaTex to generate something like: a = b iff a >= b and a <= b The problem is, LaTeX is adding a small amount of white space in the word iff. What can I do to turn this off? I tried putting curly braces around iff but that does not seem to help. Robert Sherry