possibly serious bug....need someone from HP...

[webmasterpdx]

This is a repost of a different problem, and while trying out various versions of this, I managed to reboot the calculator and another time crashed the calculator where I had to push the reset button hole in the back.

I was trying to find the intersection (algebraicly) between the functions:
y = atan(cot(pi*x))/pi + x -1/2 (staircase function)
and
y = (25-x^2)^(1/2) (circle of radius 5)

It has a solution for x=4. I can plot them and see the intersection.

So, I typed the following:

   

The result is a blank matrix, []. Why didn't it solve it?

Then I tried the following, using f(x):= instead of f:=....as in here...

   

Again with solve(f(x)=g(x),x) gives [] again...

So, first, I want to know why it doesn't solve it.

Next, without changing anything, I tried solve(f=g,x) instead of solve(f(x)=g(x),x), and got that it just hangs forever and I have to reset the calculator. The animated hourglass is going in the upper right.
After I reset it and try it again, it reboots the calculator.
On the virtual calculator it hangs for a bit and then reboots.

Let me know what you find out.