rtoy
commented
3 days ago Imported from SourceForge on 2024-07-02 15:30:01 Created by robert_dodier on 2024-04-07 05:27:53 Original: https://sourceforge.net/p/maxima/bugs/2444/#80cc
- labels: Lisp Core --> use_fast_arrays, hash tables
- status: open --> duplicate
- Group: --> None
Imported from SourceForge on 2024-07-02 15:30:00 Created by willisbl on 2012-07-12 10:53:19 Original: https://sourceforge.net/p/maxima/bugs/2444
When use_fast_arrays is true, Maxima uses CL hashtables to store undeclared arrays. These hashtables use CL equal to test equality of keys. This has some undesired consequences; for example:
(%i1) use_fast_arrays : true$ (%i2) a[factor(2*z)] : 1$ (%i3) a[2*z] : 2$ (%i4) [a[2*z], a[factor(2*z)]]; (%o4) [2,1]
See also
http://www.math.utexas.edu/pipermail/maxima/2012/029525.html http://www.math.utexas.edu/pipermail/maxima/2012/029527.html http://www.math.utexas.edu/pipermail/maxima/2012/029528.html