Dear group:
In examining past thread on this issue, I am unable to tell if this
bug is seen as resolved, but ... it isn't.
Sage 4.5.3 compiled locally on a Linux platform.
sage: reset()
sage: var('g t')
sage: x = function('x',t)
sage: forget()
sage: assume(g > 0)
sage: de = x - g * diff(x,t,2)
sage: desolve(de,x,ivar=t)
Traceback (most recent call last): desolve(de,x,ivar=t)
File "", line 1, in <module>
File "/tmp/tmpK3xCAC/___code___.py", line 9, in <module>
exec compile(u'desolve(de,x,ivar=t)
File "", line 1, in <module>
File "/netbackup/downloads/aaa_Linux/sage_foss_mathematics/
sage-4.5.3/local/lib/python2.6/site-packages/sage/calculus/
desolvers.py", line 340, in desolve
soln = maxima(cmd)
File "/netbackup/downloads/aaa_Linux/sage_foss_mathematics/
sage-4.5.3/local/lib/python2.6/site-packages/sage/interfaces/
expect.py", line 1032, in __call__
return cls(self, x, name=name)
File "/netbackup/downloads/aaa_Linux/sage_foss_mathematics/
sage-4.5.3/local/lib/python2.6/site-packages/sage/interfaces/
expect.py", line 1451, in __init__
raise TypeError, x
TypeError: Computation failed since Maxima requested additional
constraints (try the command 'assume(g>0)' before integral or limit
evaluation, for example):
Is g positive or negative?
If I replace "assume(g > 0)" with
"sage.calculus.calculus.maxima.assume(g > 0)", no difference.
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