... few more things in this project:
1. roots & Golden ratio in plot.
2. integration/derivative.
Cheers ... Jean.

Nikolai roots.sm (116 KiB) downloaded 26 time(s).

Hello Jean Giraud,

Thanks again for your attention to my questions.

Could you help me with one more question?

Why can't I calculate in the file "Nikolai roots.sm"?

Clicking the "Recalculate page" button gives the error "F() - function isn't defined.".

Is this a problem in different versions of the program or a problem in another?

Wrote

Why can't I calculate in the file "Nikolai roots.sm"?
Clicking the "Recalculate page" button gives the error "F() - function isn't defined.".
Is this a problem in different versions of the program or a problem in another?

Total and impressive disaster !
Possibly, your Smath installation is defective ?
Possibly, your Smath version is kaput ?
On that last point, Designers can confirm.
I will make a PDF, so you will be able to code/sanity.
Cheers ... Jean.

... run that test version. At worst, code as given.
You can'y escape eval(x*Bessel(1,x)-1.01*Bessel(0,x))
Cheers ... Jean.



Nikolai roots Test.sm (14 KiB) downloaded 35 time(s).