HP Prime lockup (not a complaint)

[Anders]

Yes, so trying my little trivial example of diff((z-i)^1/2,z) again with the new firmware 7820 results in the correct:
(1/2)/√(z-i)
Great! this bug is fixed.

Now, I could not resist but to press the simplify button again on (1/2)/√(z-i) and unfortunately this results in spinning hour glass (top right corner) and gives eventually physical prime:
√(IM(z)2+RE(z) 2-2*IM(z)+1) * √(√(z2 + 1*(-2-IM(z)2*RI….
and strangely on the virtual calculator a different result (complex unchecked):
(z^2*√(z^3+√(z^2+1)*(z^2-2*z+2)-2*z^2+2*z-2)+z*√(z^2+1)*√(z^3+√(z^2+1)*(z^2-2*z+2)-2*z^2+2*z-2)-z*√(z^3+√(z^2+1)*(z^2-2*z+2)-2*z^2+2*z-2)+(-1-)*√(z^2+1)*√(z^3+√(z^2+1)*(z^2-2*z+2)-2*z^2+2*z-2)+(1+)*√(z^3+√(z^2+1)*(z^2-2*z+2)-2*z^2+2*z-2))/(2*z^4*√2+2*z^3*√2*√(z^2+1)+(-4-2*)*z^3*√2+(-4-2*)*z^2*√2*√(z^2+1)+(4+4*)*z^2*√2+(4+4*)*z*√2*√(z^2+1)+(-4-4*)*z*√2+(-4*)*√2*√(z^2+1)+(4*)*√2)


Obviously, simplify() is not necessary in this example, but since it did not work well with the old f/w I just had to try it again.

Also: collect() applied to (1/2)/√(z-i) results in (1/2)/√(z-i) which is fine.