If by "fine", you mean, "with Bronze Age math", then sure. The Greeks figured some great things out in their time, but your average math undergrad would school their best in most things. We've done more with math in the last 20 years than they did in their entire 600 year history.
They didn't need to multiply in their heads to lay out the foundations of geometry and discover irrational numbers. Every generation of math grads from then on begins studies from their achievements.
> We've done more with math in the last 20 years than they did in their entire 600 year history.
What Greeks did with advancing the math profoundly affected technology and sciences. What was done in the last 20 years does not even begin to compare in impact.
They would be wrong. Calculus is huge. Linear algebra is huge. Boolean logic is insanely huge. The things we can do with numbers now make possible our modern world, something that members of HN don't need me to tell them.
All of the fields you mentioned get by mostly with modes of mathematic proof introduced by Greeks. In that sense there wasn't much new since Pythagoras until the infamous proof of map coloring theorem recently.
