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Bug? Solve in CAS causes warm start
11-28-2015, 05:24 PM
Post: #1
Bug? Solve in CAS causes warm start
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)
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11-28-2015, 08:43 PM
Post: #2
RE: Bug? Solve in CAS causes warm start
Yes, I can reproduce the warm start on the physical calculator.
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11-29-2015, 08:12 AM
Post: #3
RE: Bug? Solve in CAS causes warm start
HP 50g returns 1.06265856918E-5, no problems.
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11-29-2015, 09:41 AM (This post was last modified: 11-29-2015 09:42 AM by Nigel (UK).)
Post: #4
RE: Bug? Solve in CAS causes warm start
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)
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11-29-2015, 01:11 PM
Post: #5
RE: Bug? Solve in CAS causes warm start
I have modified giac for this case, it was returning an error (but unfortunately not on the Prime because of the OS).
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