Prime on a loop inserting a radical - Printable Version +- HP Forums (https://www.hpmuseum.org/forum) +-- Forum: HP Calculators (and very old HP Computers) (/forum-3.html) +--- Forum: HP Prime (/forum-5.html) +--- Thread: Prime on a loop inserting a radical (/thread-3004.html) Pages: 1 2 |
Prime on a loop inserting a radical - salvomic - 02-04-2015 09:54 PM I was trying to insert the radical \SQRT((t+i)/(-t+i))^i and Prime is gone on a loop without ending... Also Emulator behaviors so: top right "clepsydra" (sand clock) working, and after several minutes a dialog box: "The application has crashed and will be restarted"... With an expression like this first "Simplify" sent the calculator in crash also. The expression was c*t*e^((i/2)*ln((t+i)/(-t+i))), got applying "atrig2ln()" to the expression c*t*e^ATAN(t)... Hit "Simplify" on that expression also emulator (as Prime) hangs... *** \( \left(\sqrt{ \frac{t+i}{-t+i} }\right) ^{i} \) -> crash atrig2ln(c*t*e^ATAN(t)) -> -> \( cte^{(\frac{i}{2})\log{ \frac{(-t+i)}{-t+i} }} \) -> Simplify crash also *** Salvo RE: Prime on a loop inserting a radical - retoa - 02-06-2015 08:13 AM I tried this some 20 minutes ago, at first the sandclock worked, then it stopped, the calculator freezed and did not react to any keypresses. After a long time I had to press the reset key (paper clip) to restart it. RE: Prime on a loop inserting a radical - salvomic - 02-06-2015 08:21 AM (02-06-2015 08:13 AM)retoa Wrote: After a long time I had to press the reset key (paper clip) to restart it. now I don't remember if I pressed, instead, On+Symb, or the Prime restarted by itself... However is a strange "bug"... RE: Prime on a loop inserting a radical - retoa - 02-06-2015 08:28 AM It seems to be related to the imaginary i, I tried \( \sqrt{((t+a)/(-t+a))^a} \) and it works. Then I stored a:=i, retried tha same expression and it freezed again. RE: Prime on a loop inserting a radical - salvomic - 02-06-2015 08:36 AM (02-06-2015 08:28 AM)retoa Wrote: ... yes! Emulator (6975) crashes also with only \[ \left(\sqrt{\frac{1}{2}}\right)^{i} \] help! RE: Prime on a loop inserting a radical - retoa - 02-06-2015 08:50 AM (02-06-2015 08:36 AM)salvomic Wrote: ... Also my real Prime, it crashes already with \( \sqrt{2}^i \) Why ??? RE: Prime on a loop inserting a radical - retoa - 02-06-2015 12:28 PM xcas does not crash with these expressions, so the problem is only related to HP Prime. RE: Prime on a loop inserting a radical - salvomic - 05-13-2015 08:21 PM (02-06-2015 12:28 PM)retoa Wrote: xcas does not crash with these expressions, so the problem is only related to HP Prime. still the Prime hangs with the firmware 7820... √2^i and the Prime goes on a loop; hint: On+Symb Salvo RE: Prime on a loop inserting a radical - Marcio - 05-13-2015 08:26 PM Couldn't reproduce any of the errors reported here after the update. Never tried before though. RE: Prime on a loop inserting a radical - salvomic - 05-13-2015 08:34 PM (05-13-2015 08:26 PM)Marcio Wrote: Couldn't reproduce any of the errors reported here after the update. Never tried before though. (√2)^i here in Home ok: 0.9405+0.3396i In CAS the calculation seems endless, and I can exit only with ON+Symb :-( RE: Prime on a loop inserting a radical - Marcio - 05-13-2015 08:59 PM (05-13-2015 08:34 PM)salvomic Wrote:Oh I see. Sorry about that.(05-13-2015 08:26 PM)Marcio Wrote: Couldn't reproduce any of the errors reported here after the update. Never tried before though. RE: Prime on a loop inserting a radical - salvomic - 05-13-2015 09:00 PM (05-13-2015 08:59 PM)Marcio Wrote: Oh I see. Sorry about that. never mind, no problem by you RE: Prime on a loop inserting a radical - akmon - 05-17-2015 04:23 PM Same here, it crashes even with new firmware 7820. RE: Prime on a loop inserting a radical - Helge Gabert - 05-17-2015 05:31 PM Yes, same here, and interestingly, in CAS, (sqrt(2))^i returns sqrt(2^i). RE: Prime on a loop inserting a radical - parisse - 05-17-2015 06:09 PM I just discovered this bug today. Will be fixed for Xcas next week. RE: Prime on a loop inserting a radical - John Colvin - 05-17-2015 06:46 PM (05-13-2015 08:34 PM)salvomic Wrote:(05-13-2015 08:26 PM)Marcio Wrote: Couldn't reproduce any of the errors reported here after the update. Never tried before though. Works fine for me in both Home and CAS: 0.9405... + 0.3397...i. You might check your settings. I have the latest firmware release. RE: Prime on a loop inserting a radical - Mark Hardman - 05-17-2015 06:59 PM (05-17-2015 06:46 PM)John Colvin Wrote:(05-13-2015 08:34 PM)salvomic Wrote: (√2)^i here in Home ok: 0.9405+0.3396Works fine for me in both Home and CAS: 0.9405... + 0.3397...i. You might check your settings. I have the latest firmware release. You're getting approximate results in CAS. Try again with the Exact option checked in the CAS Settings. RE: Prime on a loop inserting a radical - John Colvin - 05-17-2015 07:14 PM (05-17-2015 06:59 PM)Mark Hardman Wrote:I assumed it was a settings issue. I tried Exact in Cas and got the symbolic answer(05-17-2015 06:46 PM)John Colvin Wrote: Works fine for me in both Home and CAS: 0.9405... + 0.3397...i. You might check your settings. I have the latest firmware release. Sqrt(2^i) but it didn't hang or crash. RE: Prime on a loop inserting a radical - Mark Hardman - 05-17-2015 08:01 PM (05-17-2015 07:14 PM)John Colvin Wrote: I assumed it was a settings issue. I tried Exact in Cas and got the symbolic answer The bug comes into play when the radical symbol (√) is used: (05-13-2015 08:34 PM)salvomic Wrote: (√2)^i here in Home ok: 0.9405+0.3396i It has already been established by Helge that the bug does not present itself if the sqrt() function is used in place of the radical symbol: (05-17-2015 05:31 PM)Helge Gabert Wrote: Yes, same here, Even the developer has agreed that this is a bug. (05-17-2015 06:09 PM)parisse Wrote: I just discovered this bug today. Will be fixed for Xcas next week. Sometimes I miss Walter. . . . Nah... RE: Prime on a loop inserting a radical - John Colvin - 05-17-2015 08:12 PM I used the square root key, not the Sqrt() function. I am not denying that there is a bug. I just can't seem to reproduce it. What are your CAS settings? |