integrate(1/x^5,x,1,2^(1/78))

[rtoy]

Imported from SourceForge on 2024-07-07 12:41:02 Created by willisbl on 2004-04-24 19:21:42 Original: https://sourceforge.net/p/maxima/bugs/563

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In addition to bug 938235, here is another similar bug. I did these calculations after applying my gfactor patch. These are okay:

(C2) integrate(1/x^5,x,1,sqrt(2)); (D2) 3/16

(C3) integrate(1/x^5,x,1,2^(1/23)); (D3) (2^(4/23)-1)/(4*2^(4/23))

But we get a quotient by zero error for

(C4) integrate(1/x^5,x,1,2^(1/78)); QUOTIENT by ZERO

Changing gcd and algebraic doesn't help

(C5) algebraic : true$ (C6) gcd : 'spmod$ (C7) integrate(1/x^5,x,1,2^(1/78)); QUOTIENT by ZERO

(C8) build_info();

Maxima version: 5.9.0.1cvs Maxima build date: 13:6 4/24/2004 host type: i686-pc-mingw32 lisp-implementation-type: Kyoto Common Lisp lisp-implementation-version: GCL 2.7.0

Barton

[rtoy]

Imported from SourceForge on 2024-07-07 12:41:03 Created by robert_dodier on 2005-08-22 03:13:28 Original: https://sourceforge.net/p/maxima/bugs/563/#afb8

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• labels: --> Lisp Core

[rtoy]

Imported from SourceForge on 2024-07-07 12:41:07 Created by robert_dodier on 2005-08-22 03:13:28 Original: https://sourceforge.net/p/maxima/bugs/563/#adfb

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Logged In: YES user_id=501686

For these examples I don't get "quotient by 0" but I do get an incorrect result ...

integrate(1/x^5,x,1,2^(1/78)); => 0

algebraic : true$ gcd : 'spmod$ integrate(1/x^5,x,1,2^(1/78)); => 0

Maxima version: 5.9.1.1cvs Maxima build date: 22:27 8/19/2005 host type: i686-redhat-linux-gnu lisp-implementation-type: CLISP lisp-implementation-version: 2.33.2 (2004-06-02)

also

Maxima version: 5.9.1.1cvs Maxima build date: 10:35 8/20/2005 host type: @host@ lisp-implementation-type: GNU Common Lisp (GCL) lisp-implementation-version: GCL 2.6.6

[rtoy]

Imported from SourceForge on 2024-07-07 12:41:11 Created by rtoy on 2006-03-13 15:33:32 Original: https://sourceforge.net/p/maxima/bugs/563/#aad9

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• status: open --> closed