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Vibron(Updated)1-Visitor
1-Visitor
May 30, 2012
Question

Programming symbolically

  • May 30, 2012
  • 4 replies
  • 1914 views

To community.

here I pose a simple question. To make mathemathical formalism compact I need

2 activ symbols:  Everybody knows  the operator  d/dx: It is called total derevative.

Derevation of a funktion with several varibles one needs the partial derevation and additionally

a time derevation , for example: p( point on top)

                                              d f( q )/dt = ∂f(q)/∂q *dq/dt...........further partial drevations, if q vector

I need not text symbols but I need an activ operator :  ∂/∂q  and  q( point on top)

I am working with Jacobi matrices but in Mathcad Prime 2.0   I cannot find anything.

Please,  if anybody will read this, give me some ideas.

Vibron,  answers to manfred.neubauer20@email.de

4 replies

D
DanMarotta12-Amethyst
12-Amethyst
May 30, 2012

Manfred, I do hope you receive a response to your question. If you do not, I recommend re-posting your question as a discussion rather than a blog.

H
HarveyHensley12-Amethyst
12-Amethyst
June 28, 2012

Seems like you should be able to just define a function that includes all of the partial derivatives and q as an argument?

V
Vibron(Updated)1-VisitorAuthor
1-Visitor
July 8, 2012

Dear Harvey,

I beg your pardon, I was 14 days on holliday.

I left my password at home. So I could not answer.

I can tell you ; I have got a funktion of 2 m in length.

And I use at the end of my work the Lagrangian Equation of 2 nd kind.

There are in this equation 2 partial derivatives.

In Mathcad a partial derivation does not exist.  One can do all with d/dx.

In the mathematical and physical space one can not do that.

I am aware now that engineers have there own tradition to do mathematics.

greetings

vibron

H
HarveyHensley12-Amethyst
12-Amethyst
July 8, 2012

Vibron,

The snip below shows the functionality that I believe you are after, but I think you also want new symbols for the partial derivative operation.  I can't help with that.

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