6179 Crashes Legendre

6179 Crashes Legendre - 6179 Crashes Legendre - Сообщения

#1 Опубликовано: 03.01.2017 12:52:58
Jean Giraud

Jean Giraud

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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 (11 КиБ) скачан 40 раз(а).
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Davide Carpi 03.01.2017 13:11:00, Andrey Ivashov 07.01.2017 18:56:00
#2 Опубликовано: 03.01.2017 13:11:27
Davide Carpi

Davide Carpi

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confirmed, thank you!
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#3 Опубликовано: 08.01.2017 10:00:55
Jean Giraud

Jean Giraud

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... Ah ! this damned bug is isolated, but no cure.
Was OK 5346 ! Now dead 6179.

Jean

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Radovan Omorjan 08.01.2017 12:05:00
#4 Опубликовано: 08.01.2017 12:05:59
Radovan Omorjan

Radovan Omorjan

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Confirmed,

Regards,
Ra
When Sisyphus climbed to the top of a hill, they said: "Wrong boulder!"
#5 Опубликовано: 13.01.2017 13:26:26
Jean Giraud

Jean Giraud

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Was OK 5346 but not 6179.
At least it is isolated.

Jean

Bug 6179 Legendre Crashes.sm (39 КиБ) скачан 36 раз(а).
#6 Опубликовано: 13.01.2017 14:01:29
Davide Carpi

Davide Carpi

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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
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#7 Опубликовано: 14.01.2017 12:55:38
Jean Giraud

Jean Giraud

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Wrote

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

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