ratsolve weirdness



I don't see documentation for ratsolve , but
ratsolve apparently does not take an equation as first argument.

ratsolve(a=1,a)   gives a=0.
ratsolve(a-1,a)   gives a=1.

RJF
  C Y wrote:

> I don't know if this is a bug, local quirk, or what, but ratsolve seems
> to be giving me a wrong answer here:
> 
> Maxima 5.9.1.1cvs http://maxima.sourceforge.net
> Using Lisp SBCL 0.8.20
> (%i1) ratsolve(d=sqrt(h^2/a^2+k^2/b^2+l^2/c^2)^-1,a);
>                                     b c h
> (%o1)                      [a = - ---------, a = 0]
>                                   b l + c k
> 
> This is obviously nonsense because the solution doesn't even contain d.
>  Did I flub it up somehow?  Can anyone reproduce this?  Is it expected?
> 
> CY
> 
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