lambda doesn't wro

[rtoy]

Imported from SourceForge on 2024-07-03 10:30:13 Created by nobody on 2014-09-06 04:07:28 Original: https://sourceforge.net/p/maxima/bugs/2811

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To get eigenvalues of an intricate 2x2 matrix, My handmade expression can yield eigenvalues properly. But,when I try the command eigenvectors(X) ; ,error messages come out as follows. (Sorry,garbage characters instead of Greek characters have appeared.)

(%i1) X:matrix([1,1],[1,1]) ;

(%o1) ( 1 1 1 1 ) (%i2) X[1,1]: alpha[1]*c[1]^2/3 + c[3]^3 - log(delta[1]) + f^5 ;

(%o2) f^5-log (?_1)+c_3^3+(?_1c_1^2)/3 (%i3) X[1,2]: exp( eta[1] + beta[2] ) - log(d) ;

(%o3) e^(?_2*b+?_1)-log (d) (%i4) X[2,1]: log( eta[1] + eta[2]/b ) + exp(d) ;

(%o4) e^d+log ((?_2)/b+?_1) (%i5) X[2,2]: log(alpha[2]*c[2]^5/5 - c[1]/5) + exp(delta[2]) - lambda[2] ;

(%o5) log ((?_2*c_2^5)/5-(c_1)/5)-?_2+e^(?_2) (%i6) X ;

(%o6) ( f^5-log (?_1)+c_3^3+(?_1c_1^2)/3 e^(?_2b+?_1)-log (d) e^d+log ((?_2)/b+?_1) log ((?_2c_2^5)/5-(c_1)/5)-?_2+e^(?_2) ) (%i8) eigenvalue[1]: (X[1,1]+X[2,2])/2 + sqrt( (X[1,1]-X[2,2])^2
+4X[1,2]*X[2,1] )/2 ;

(%o8) (sqrt((f^5-log ((?_2c_2^5)/5-(c_1)/5)-log
(?_1)+c_3^3+?_2+(?_1c_1^2)/3-e^(?_2))^2+4(e^d+log
((?_2)/b+?_1))(e^(?_2b+?_1)-log (d))))/2+(f^5+log
((?_2c_2^5)/5-(c_1)/5)-log (?_1)+c_3^3-?_2+(?_1c_1^2)/3+e^(?_2))/2 (%i9) eigenvalue[2]: (X[1,1]+X[2,2])/2 - sqrt( (X[1,1]-X[2,2])^2
+4X[1,2]*X[2,1] )/2 ;

(%o9) (f^5+log ((?_2c_2^5)/5-(c_1)/5)-log
(?_1)+c_3^3-?_2+(?_1c_1^2)/3+e^(?_2))/2-(sqrt((f^5-log
((?_2c_2^5)/5-(c_1)/5)-log
(?_1)+c_3^3+?_2+(?_1c_1^2)/3-e^(?_2))^2+4(e^d+log
((?_2)/b+?_1))(e^(?_2*b+?_1)-log (d))))/2 (%i10) eigenvectors(X) ;

Maxima encountered a Lisp error:

Error in PROGN [or a callee]: Caught fatal error [memory may be damaged]

Automatically continuing. To enable the Lisp debugger set debugger-hook to nil.

To remedy this, only by changing "lambda" into "%lambda" the command eigenvectors work properly either on wxMaxima or on TeXmacs.

The version information of my system is as follows. Debian 7.5 . wxMaxima 12.04.0-1 TeXmacs 1:1.0.7.15-2

build_info("5.27.0","2012-05-09
21:24:21","x86_64-unknown-linux-gnu","GNU Common Lisp (GCL)","GCL
2.6.7")

Also reported at http://ehc.ac/p/maxima/mailman/message/32458023/

[rtoy]

Imported from SourceForge on 2024-07-03 10:30:14 Created by robert_dodier on 2014-09-08 23:57:01 Original: https://sourceforge.net/p/maxima/bugs/2811/#0ac0

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• status: open --> closed

[rtoy]

Imported from SourceForge on 2024-07-03 10:30:18 Created by robert_dodier on 2014-09-08 23:57:01 Original: https://sourceforge.net/p/maxima/bugs/2811/#01ce

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Duplicate of #2812. Closing this report.