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Nigel (UK) · 11-28-2015, 05:24 PM

On my Prime (latest firmware) entering (for example)

Code:

solve(x^3=1.2e-15,x)

in the CAS screen causes a warm start on the physical calculator, and a crash on the emulator. fsolve behaves in the same way.

The crash doesn't happen if the right-hand side is greater than 1e-12, or if x^3 is replaced by x^2.

Can anyone reproduce this? If so, is it a known bug?

Nigel (UK)

retoa · 11-28-2015, 08:43 PM

Yes, I can reproduce the warm start on the physical calculator.

Gerald H · 11-29-2015, 08:12 AM

HP 50g returns 1.06265856918E-5, no problems.

Nigel (UK) · (This post was last modified: 11-29-2015 09:42 AM by Nigel (UK).)

A workaround: enter

Code:

solve(x^3.0=1.2e-15,x)

(note the 3.0 in the power) and the correct solution is given with no crash. This works with both solve and fsolve. Still a bug, though, I'd say!

Nigel (UK)

parisse · 11-29-2015, 01:11 PM

I have modified giac for this case, it was returning an error (but unfortunately not on the Prime because of the OS).