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Offline Jean Giraud  
#1 Posted : 03 January 2017 18:52:58(UTC)
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This one is not nice ! It may reflect on other of this kind
[Hermite ...] from the documentation. 5346 was OK .
Autocalc is OFF.

Jean

Bug 6179 Integrate Legendre Crashes.sm (12kb) downloaded 21 time(s).

Edited by moderator 13 January 2017 19:57:19(UTC)  | Reason: Not specified

thanks 2 users thanked Jean Giraud for this useful post.
on 03/01/2017(UTC),  on 08/01/2017(UTC)

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Offline Davide Carpi  
#2 Posted : 03 January 2017 19:11:27(UTC)
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confirmed, thank you!
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Offline Jean Giraud  
#3 Posted : 08 January 2017 16:00:55(UTC)
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... Ah ! this damned bug is isolated, but no cure.
Was OK 5346 ! Now dead 6179.

Jean

Bug 6179 Integrate Legendre Crashes.sm (40kb) downloaded 18 time(s).

Edited by moderator 08 January 2017 22:25:56(UTC)  | Reason: marked as issue

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on 08/01/2017(UTC)
Offline omorr  
#4 Posted : 08 January 2017 18:05:59(UTC)
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Confirmed,

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Offline Jean Giraud  
#5 Posted : 13 January 2017 19:26:26(UTC)
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Was OK 5346 but not 6179.
At least it is isolated.

Jean

Bug 6179 Legendre Crashes.sm (40kb) downloaded 18 time(s).
Offline Davide Carpi  
#6 Posted : 13 January 2017 20:01:29(UTC)
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Hello Jean,

Seems the crash it is related with the name of the iterator argument of sum().

Until is not fixed you can cure it by renaming k in either one of L(x,n) or the for loop (move on the variable k, press F8 and rename it at once), then you can evaluate safely.


moderation: topics merged

Edited by user 13 January 2017 20:08:36(UTC)  | Reason: Not specified

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Offline Jean Giraud  
#7 Posted : 14 January 2017 18:55:38(UTC)
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Originally Posted by: Davide Carpi Go to Quoted Post
Hello Jean,

Seems the crash it is related with the name of the iterator argument of sum().

Until is not fixed you can cure it by renaming k in either one of L(x,n) or the for loop (move on the variable k, press F8 and rename it at once), then you can evaluate safely.


Thanks Davide: it evaluates.

But the nice symbolic evaluation can't be assigned as expanded.
So, for the coefficients and polyroots we are forced to copy/paste.
Not convenient for n > 4
Up until now: Smath 6179 does not accept Legendre as companion.
This "bug" of impossible isolation reflects on the "numden".
Was working great 5346 but not anymore 6179. I understand why
the collab from Russia asked several times about "numden".
My nice western 5346 turned red over east !!!

Legendre plots for any 'n'. For the roots and weigth: from the web.

Jean

Bug 6179 Legendre for Doctoring.sm (50kb) downloaded 17 time(s).

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