fsolve() crash with given Interval

[parisse]

I have a suggestion: what about translating lowercase 1-letter variable names to uppercase 1-letter variable names when doing Menu->Get from CAS? If you leave them lowercase, you get an error anyway. I think this would ease the transfert from CAS expressions to the Apps and we could have the best of both worlds!
By the way sliders work on the Prime (except that they are not interactive, in Xcas you can move the slider with the mouse and all computations after the slider are re-computed).