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dchandiramani1-Visitor
1-Visitor
April 26, 2017
Question

Derivative of Kelvin Function

  • April 26, 2017
  • 2 replies
  • 3263 views

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.

Thanks.

2 replies

L
LucMeekes23-Emerald IV
23-Emerald IV
April 26, 2017

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:

Success!

Luc

L
LucMeekes23-Emerald IV
23-Emerald IV
April 26, 2017

Prime knows even how to express them symbolically:

gives:

because:

Luc

W
Werner_E25-Diamond I
25-Diamond I
April 26, 2017

LucMeekes wrote:

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.

W
Werner_E25-Diamond I
25-Diamond I
April 26, 2017

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.

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