Prime on a loop inserting a radical

02042015, 09:54 PM
(This post was last modified: 02062015 11:27 AM by salvomic.)
Post: #1




Prime on a loop inserting a radical
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 ∫aL√0mic (IT9CLU), HP Prime 50g 41CX 71b 42s 12C 15C  DM42 WP34s :: Prime Soft. Lib 

02062015, 08:13 AM
Post: #2




RE: Prime on a loop inserting a radical
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. 

02062015, 08:21 AM
Post: #3




RE: Prime on a loop inserting a radical
(02062015 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"... ∫aL√0mic (IT9CLU), HP Prime 50g 41CX 71b 42s 12C 15C  DM42 WP34s :: Prime Soft. Lib 

02062015, 08:28 AM
(This post was last modified: 02062015 08:30 AM by retoa.)
Post: #4




RE: Prime on a loop inserting a radical
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. 

02062015, 08:36 AM
(This post was last modified: 02062015 08:45 AM by salvomic.)
Post: #5




RE: Prime on a loop inserting a radical
(02062015 08:28 AM)retoa Wrote: ... yes! Emulator (6975) crashes also with only \[ \left(\sqrt{\frac{1}{2}}\right)^{i} \] help! ∫aL√0mic (IT9CLU), HP Prime 50g 41CX 71b 42s 12C 15C  DM42 WP34s :: Prime Soft. Lib 

02062015, 08:50 AM
Post: #6




RE: Prime on a loop inserting a radical  
02062015, 12:28 PM
Post: #7




RE: Prime on a loop inserting a radical
xcas does not crash with these expressions, so the problem is only related to HP Prime.


05132015, 08:21 PM
Post: #8




RE: Prime on a loop inserting a radical
(02062015 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 ∫aL√0mic (IT9CLU), HP Prime 50g 41CX 71b 42s 12C 15C  DM42 WP34s :: Prime Soft. Lib 

05132015, 08:26 PM
Post: #9




RE: Prime on a loop inserting a radical
Couldn't reproduce any of the errors reported here after the update. Never tried before though.


05132015, 08:34 PM
Post: #10




RE: Prime on a loop inserting a radical
(05132015 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 :( ∫aL√0mic (IT9CLU), HP Prime 50g 41CX 71b 42s 12C 15C  DM42 WP34s :: Prime Soft. Lib 

05132015, 08:59 PM
Post: #11




RE: Prime on a loop inserting a radical
(05132015 08:34 PM)salvomic Wrote:Oh I see. Sorry about that.(05132015 08:26 PM)Marcio Wrote: Couldn't reproduce any of the errors reported here after the update. Never tried before though. 

05132015, 09:00 PM
Post: #12




RE: Prime on a loop inserting a radical
∫aL√0mic (IT9CLU), HP Prime 50g 41CX 71b 42s 12C 15C  DM42 WP34s :: Prime Soft. Lib 

05172015, 04:23 PM
Post: #13




RE: Prime on a loop inserting a radical
Same here, it crashes even with new firmware 7820.


05172015, 05:31 PM
(This post was last modified: 05172015 05:36 PM by Helge Gabert.)
Post: #14




RE: Prime on a loop inserting a radical
Yes, same here,
and interestingly, in CAS, (sqrt(2))^i returns sqrt(2^i). 

05172015, 06:09 PM
Post: #15




RE: Prime on a loop inserting a radical
I just discovered this bug today. Will be fixed for Xcas next week.


05172015, 06:46 PM
Post: #16




RE: Prime on a loop inserting a radical
(05132015 08:34 PM)salvomic Wrote:(05132015 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. 

05172015, 06:59 PM
Post: #17




RE: Prime on a loop inserting a radical
(05172015 06:46 PM)John Colvin Wrote:(05132015 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. Ceci n'est pas une signature. 

05172015, 07:14 PM
Post: #18




RE: Prime on a loop inserting a radical
(05172015 06:59 PM)Mark Hardman Wrote:I assumed it was a settings issue. I tried Exact in Cas and got the symbolic answer(05172015 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. 

05172015, 08:01 PM
(This post was last modified: 05172015 08:03 PM by Mark Hardman.)
Post: #19




RE: Prime on a loop inserting a radical
(05172015 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: (05132015 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: (05172015 05:31 PM)Helge Gabert Wrote: Yes, same here, Even the developer has agreed that this is a bug. (05172015 06:09 PM)parisse Wrote: I just discovered this bug today. Will be fixed for Xcas next week. Sometimes I miss Walter. . . . Nah... Ceci n'est pas une signature. 

05172015, 08:12 PM
Post: #20




RE: Prime on a loop inserting a radical
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?


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