Bob Wonderly wrote:
> Using Sage I solved a long list of equations and put the solutions (s)
> in a list; e.g.:
>
> sage: for j in range(52,54,1):
> q = slst[j]
> j=q[0]; k=(q[1]); s=(q[2])
> (q,j,k,s)
> .....:
> ([52, 30, 2081203288L], 52, 30, 2081203288L)
> ([53, 53, 17903198518682712L], 53, 53, 17903198518682712L)
>
> Now I want to plug j and s into the list of y equations so that I can do
> further calculations involving i. But Sage appears to be getting hung on
> the s being long:
>
> sage: for j in range(52,54,1):
> q = slst[j]
> j=q[0]; k=(q[1]); s=(q[2])
> y = 2*(2**k)*i + s
> (j,k,s,y)
> .....:
> ....
> ....
> TypeError: unsupported operand parent(s) for '+': 'Symbolic Ring' and
> '<type 'long'>'
>
> When I take the s out of the equation for y it's OK:
>
> sage: for j in range(52,54,1):
> q = slst[j]
> j=q[0]; k=(q[1]); s=(q[2])
> y = 2*(2**k)*i
> (j,k,s,y)
> .....:
> (52, 30, 2081203288L, 2147483648*i)
> (53, 53, 17903198518682712L, 18014398509481984*i)
>
> FWIW:
>
> sage: type(j), type(k), type(s), type(y), type(i)
>
>
> (<type 'int'>,
> <type 'int'>,
> <type 'long'>,
> <class 'sage.calculus.calculus.SymbolicArithmetic'>,
> <class 'sage.calculus.calculus.SymbolicVariable'>)
>
> None of the tricks I tried have convinced Sage and y that s is OK.
Can you try converting s to an element that Sage knows by saying:
y = 2*(2**k)*i + Integer(s)
That said, I reproduced your error with just:
sage: var("b")+long(2)
---------------------------------------------------------------------------
TypeError Traceback (most recent call last)
/home/grout/sage/devel/sage-main/sage/plot/<ipython console> in <module>()
/home/grout/sage/devel/sage-main/sage/plot/element.pyx in
sage.structure.element.ModuleElement.__add__
(sage/structure/element.c:5748)()
/home/grout/sage/devel/sage-main/sage/plot/coerce.pyx in
sage.structure.coerce.CoercionModel_cache_maps.bin_op
(sage/structure/coerce.c:6364)()
TypeError: unsupported operand parent(s) for '+': 'Symbolic Ring' and
'<type 'long'>'
Jason
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