#2025: bug in applying functions to a symbolic matrix
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Reporter: was | Owner: gfurnish
Type: defect | Status: closed
Priority: major | Milestone: sage-duplicate/invalid/wontfix
Component: calculus | Resolution: invalid
Keywords: |
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Changes (by mhansen):
* status: assigned => closed
* resolution: => invalid
* milestone: sage-4.0.1 => sage-duplicate/invalid/wontfix
Comment:
This is now fixed due to the changes in 4.0
{{{
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| Sage Version 4.0.1.rc1, Release Date: 2009-06-04 |
| Type notebook() for the GUI, and license() for information. |
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sage: sage: m = matrix(1,[-x/(2*x-4)])
sage: sage: m.apply_map(lambda e: taylor(e,x,0,4))
[1/32*x^4 + 1/16*x^3 + 1/8*x^2 + 1/4*x]
sage: sage: m.apply_map(lambda e: taylor(e,x,0,4))
[1/32*x^4 + 1/16*x^3 + 1/8*x^2 + 1/4*x]
sage: sage: m.apply_map(lambda e: taylor(e,x,1,4))
[(x - 1)^4 + (x - 1)^3 + (x - 1)^2 + x - 1/2]
sage: sage: m.apply_map(lambda e: taylor(e,x,2,4))
[-1/(x - 2) - 1/2]
sage: sage: m.apply_map(lambda e: taylor(e,x,3,4))
[-(x - 3)^4 + (x - 3)^3 - (x - 3)^2 + x - 9/2]
sage: sage: m[0,0].taylor(x,3,4)
-(x - 3)^4 + (x - 3)^3 - (x - 3)^2 + x - 9/2
}}}
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Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/2025#comment:5>
Sage <http://sagemath.org/>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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