These tags indicate that Maxima is using a special-purpose internal
representation. A third one is /P/ for Poisson series. From the
user's point of view, they indicate that the expressions behave
differently from general representation. Most are contagious, so for
example 1/x + x in general representation simplifies to x+1/x, but
rat(x)+1/x simplifies to (x^2+1)/x.
Why do you ask?
-s
On 2011-04-15, Wilhelm Haager <wilhelm.haager at htlstp.ac.at> wrote:
> Hi,
>
> Maxima sometimes appends some curious "tags" to the output
> expressions:
>
> e.g. rat(x/y) produces the tag /R/ which obviously means a
> "canonical rational expression" (whatever that is).
>
> taylor(sin(x),x,0,3) produces the tag /T/ which obviously means
> "taylor series".
>
> Those tags, which are assumedly not part of the expession itself,
> can be removed by apply(op(..),args(...)).
>
> Is there a general principle or a deeper mind for those tags?
>
> What is the actual effect of them
> (just appending + ... do the expression (for /T/), or even more)?
>
> Where are those tags stored (if not as part of the expression)?
>
> Are there more such tags than /R/ and /T/?
>
> Thanks in advance for answers
> Wilhelm Haager
>
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