Hi all, I have a question. Suppose f : [ 0, l) [itex]\rightarrow[/itex] ℝ is concave , increasing and continuous where l < ∞ and g : [ 0, l) [itex]\rightarrow[/itex] ℝ is also concave, nondecreasing and continous on the same interval. Can we claim that f and g intersect finitely many times in this interval (possibly 0) ? What if number l replaces with infinity? Thanx in advance, H.