Re: [Maxima-discuss] ctensor modifications

[Viktor T. T. <vt...@vt...>]

Dear Daniel,

Indeed many (most?) of Richard's proposed changes were incorporated into 
ctensor years ago, though not necessarily verbatim. There are a few that 
remain in my "open issues" notes, because behind the change, there are 
deeper concerns. Richard, I believe, is inspired in part by what he has 
seen in the later commercial Macsyma releases, but my concern is that 
not everything in those releases was 100% kosher, and indeed, "old" 
Maxima had issues from the onset with nonsymmetric tensors as it could 
not manage index ordering across mixed indices for starters. (This was 
what led me in a slightly different direction with itensor in the early 
2000's; so Maxima's itensor and Macsyma's version are cousins, one is 
not a descendant of the other.)


Viktor



On 7/23/2025 5:25 PM, Daniel Volinski via Maxima-discuss wrote:
> Hi Viktor,
>
> I understand that Richard Gobeli suggested some modification and bug 
> fixes to the ctensor package
> in Maxima -- GPL CAS based on DOE-MACSYMA / Patches / #96 Ctensor 
> patch <https://sourceforge.net/p/maxima/patches/96/>.
> Have these modifications been incorporated into Maxima ctensor package?
>
> Thanks,
>
> Daniel Volinski
>
>
>
>
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