CAS simplifying non-zero expressions to 0

[Nigel (UK)]

(10-06-2014 04:27 PM)parisse Wrote:  Nigel: Solving 6.63e-34 x f = E should ideally be done via solve(h*f=E,f) then replace h and E by their values or with fsolve (E replaced by it's numerical value). I'll have a look for solve(6.63e-34*f = E,f) but improving the exact solver is certainly difficult (not for linear equations of course, but for more complicated equations, symbolic solving does not use the same kind of algorithms than numeric solving).

Thank you for trying to see my position. I understand that numerical solving and symbolic solving are different and I do not expect miracles, but it would be nice if what works for normal-sized approximate numbers could be made to work for smaller approximate numbers as well, so that I can tackle microscopic problems and macroscopic problems in the same way.

Nigel (UK)