Hi:
The commands
[EMAIL PROTECTED]:~/sagefiles/sage-2.8.2> ./sage
----------------------------------------------------------------------
| SAGE Version 2.8.5, Release Date: 2007-09-21 |
| Type notebook() for the GUI, and license() for information. |
----------------------------------------------------------------------
sage: t = var('t')
sage: x = function('x', t)
sage: (m,b,k,w,g,F0) = var("m,b,k,w,g,F0")
sage: de = lambda y: diff(y,t,t) + w^2*y - F0*cos(g*t)
sage: F0 = 1; g = 1; w = 2
sage: desolve_laplace(de(x(t)),["t","x"],[0,0,0])
'cos(t)/3-cos(2*t)/3'
work fine on the command line but online (using the
sage.math notebook) they give an error
Exception (click to the left for traceback):
...
TypeError: unsupported operand parent(s) for '+': '<type 'str'>' and
'Symbolic Ring'
This is an issue since this specific problem is a
possible assignment for my DEs classes this semester.
Some students can't install the SAGE software due to
inexperience with computers, so I wanted to give them
the option of using sage.math instead.
- David Joyner
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