Because I is the square root of -1.
sage: type(I)
class 'sage.functions.constants.I_class'
sage: type(J)
class 'sage.calculus.calculus.SymbolicVariable'
sage: type(R)
class 'sage.calculus.calculus.SymbolicVariable'
Yeah this is pretty confusing if it's not what you expected.
david
On
On 7/2/07, David Harvey [EMAIL PROTECTED] wrote:
Because I is the square root of -1.
Yep. If you want I to be a symbolic variable do
sage: I = var('I')
sage: a = E == I * R
sage: solve(a, R)
[R == (E/I)]
In general, it is always a good idea to use the var command to
explicitly construct
