Prime has built in kelvin functions ber and bei.
I would like to know if it also has ber' and bei' which are derivatives of the Kelvin function.
They are not predefined. If they existed, I should think they would be called Dber and Dbei, similar to the derivatives of the Airy functions DAi and DBi.
But that should not impede you to use them:
Or, in Prime:
Prime knows even how to express them symbolically:
Opps! Is that new in Prime 4 ?
Here in Prime 3:
EDIT: Not my day!
Had overlooked your first post and had not noticed that you also defined the derivative yourself in the second one.
I guess it is. 15 days left to play... (and be terribly annoyed by the slow UI).
Mathcad 11 symbolically gives:
Not more than what you have there in Prime 3.
Guess you misunderstood my post.
At first glance over your post I had the impression, your version of prime would know about Dber and Dbei out of the box. It was only after pressing "Add reply" that I noticed you defined them manually, too.
In Mathcad 15 the symbolics does not know anything about bei and ber, but also in Prime 3 the symbolics knows about "bei" and "ber" and gives us the appropriate result for the derivatives:
Guess you're right. Misunderstanding.
Anyway, I conclude here that something was changed going from Mathcad to Prime, and this change is an improvement.
Prime does not provide those derivatives of those Bessel functions out of the box, but you can define them yourself:
You may even use the prime symbol ' in the name by first writing the name as text between quotes "...." and then deleting the quotation marks.