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Transpose symbol
11-20-2017, 08:48 PM (This post was last modified: 11-20-2017 09:16 PM by salvomic.)
Post: #1
Transpose symbol
hi,
in this new version there will be too many irons in the fire (well!), but in a next release I hope to have a "transpose symbol", a facility symbol for matrix traspose, a synonym for TRN() command:
\( A^{T} \) or Aͭ A⊤ or similar writings...

Maybe only an affectation (however with a lot of matrices it would be simpler to use), but... is it possible?

Salvo

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11-20-2017, 10:46 PM
Post: #2
RE: Transpose symbol
As a matter of fact there are two commands: TRN, and transpose of which the first conjugates, too, if complex is on, which one should be available shorthanded? So I think that would result in a bit more confusion.
Arno
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11-20-2017, 10:59 PM
Post: #3
RE: Transpose symbol
(11-20-2017 10:46 PM)Arno K Wrote:  As a matter of fact there are two commands: TRN, and transpose of which the first conjugates, too, if complex is on, which one should be available shorthanded? So I think that would result in a bit more confusion.
Arno

yes, I know; however to avoid confusion maybe distinguish between T (transpose) and H (conjugate traspose, Hermitian) could help... But in this case we need two symbols. No, too many Smile

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11-21-2017, 05:28 AM
Post: #4
RE: Transpose symbol
Hello,

Unlikely.
Such symbols would be postfix operators and they are a pain due to operator priority issues.

Cyrille

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11-21-2017, 06:49 AM
Post: #5
RE: Transpose symbol
Inside Xcas you can use A^* for the transconjugate of A, it could be the same in the CAS.
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11-21-2017, 07:37 AM
Post: #6
RE: Transpose symbol
(11-21-2017 06:49 AM)parisse Wrote:  Inside Xcas you can use A^* for the transconjugate of A, it could be the same in the CAS.

It seems that it is not working

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11-21-2017, 08:13 AM (This post was last modified: 11-21-2017 08:31 AM by salvomic.)
Post: #7
RE: Transpose symbol
(11-21-2017 05:28 AM)cyrille de brébisson Wrote:  Unlikely.
Such symbols would be postfix operators and they are a pain due to operator priority issues.
Cyrille

hi Cyrille,
I fancy it is tricky to implement and a real pain. My idea was inspired by the books, that have the "postfix" symbols T and H for matrix transpose (like them were postfix), so we have this "forma mentis" and habit and sometimes a reluctance to think that operation prefix...
Like we do with the inverse, ^-1, is easy to think "now I put ^T to traspose..."

(11-21-2017 06:49 AM)parisse Wrote:  Inside Xcas you can use A^* for the transconjugate of A, it could be the same in the CAS.

(11-21-2017 07:37 AM)Carlos295pz Wrote:  It seems that it is not working

Yes, it doesn't work in CAS in the Prime. It could be an half solution, or *the* solution, however...
Cyrille, do you think it could, in the future, activated in the Prime CAS?

Salvo

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11-21-2017, 11:08 AM
Post: #8
RE: Transpose symbol
I would appreciate that functionality too.

And although "H" probably only makes sense for square matrices, the transpose would be useful for any rectangle matrix, i.e. including vectors. I often transpose the solutions of an equation to make them more readable...
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