MathGroup Archive 2004

[Date Index] [Thread Index] [Author Index]

Search the Archive

Assumption -> quadratic multivariate function


Hi Peter, 

Thank you very much for the tip. However, instead of

>    f /: Dt[f, ___, {x | y, 3}, ___] = 0;

I think the bulletproof assignment would be

      f/: Dt[f, ___, {_, k_/; k>= 3}, ___] = 0;

> I suppose you would like to add
>    x/: Dt[x, ___, y | {y, _}, ___] = 0;
>    y/: Dt[y, ___, x | {x, _}, ___] = 0;
> too ;-)

Is this really necessay? I thought that Mathematica automatically 
assumes the variables are independent.

Damir


  • Prev by Date: Overflow --> Abort evaluation
  • Next by Date: RE: sort list
  • Previous by thread: Re: Assumption -> quadratic multivariate function
  • Next by thread: Options in Plot