[Libreoffice-bugs] [Bug 104753] Missing option do have a symbol with a subscript and a prime symbol in LibO Math

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=104753

Xisco Faulí  changed:

   What|Removed |Added

 Status|NEEDINFO|UNCONFIRMED
 Ever confirmed|1   |0

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[Libreoffice-bugs] [Bug 104753] Missing option do have a symbol with a subscript and a prime symbol in LibO Math

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=104753

--- Comment #7 from sergio.calleg...@gmail.com ---
Created attachment 137410
  --> https://bugs.documentfoundation.org/attachment.cgi?id=137410=edit
Demo file, with visual answer to question.

This is odg and contains both "LaTeX" rendering (rendered as svg via the
texmaths extension) and the corresponding LibO Math rendering.

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[Libreoffice-bugs] [Bug 104753] Missing option do have a symbol with a subscript and a prime symbol in LibO Math

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=104753

--- Comment #6 from sergio.calleg...@gmail.com ---
Sorry for having missed your questions before. Please check the attached file.

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[Libreoffice-bugs] [Bug 104753] Missing option do have a symbol with a subscript and a prime symbol in LibO Math

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=104753

Xisco Faulí  changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEEDINFO
 CC||xiscofa...@libreoffice.org
 Ever confirmed|0   |1

--- Comment #5 from Xisco Faulí  ---
> What does LaTeX, if you do not use a prime but a different character, for
> example a "T"? Would you please attach an image, how LaTeX renders these
> examples, in a large zoom?

Dear Reporter,
Could you please answer the question above?
I have set the bug's status to 'NEEDINFO'. Please change it back to
'UNCONFIRMED' once the question is answered

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[Libreoffice-bugs] [Bug 104753] Missing option do have a symbol with a subscript and a prime symbol in LibO Math

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=104753

--- Comment #4 from Regina Henschel  ---
Created attachment 129786
  --> https://bugs.documentfoundation.org/attachment.cgi?id=129786=edit
Use of mpadded in MathML

(In reply to sergio.callegari from comment #3)
> Note that the issue can be solved in different ways:
> 
> 1) Assuring that ' is treated as a proper superscript, so that a subscript
> is placed below it and not also to the side of it;

There is no problem using an apostrophe (' U+0027) or a prime (′ U+2032) as
superscript and stacking of superscript and subscript works too. But for these
two characters the tick is rendered high in itself, so it looks as if it is
placed very high, in case the character is set to superscript in addition.

To get a better looking solution, you need an option to get influence on the
position, and that would be way "2". The currently possible setting in Format >
Spacing > Category: Indexes is a global setting. A setting per character or
group is needed. 

> 
> 2) providing the concept of "negative space" to LibO Math, so that one can
> remove the horizontal space taken by the prime sign.

I would go with this proposal, because the normative language is not StarMath
but MathML. And MathML has already the attributes lspace and voffset in its
 element and allows negative values for them. The request here would
be to extend StarMath to support this element and its attributes.

I have attached MathML examples, where you can see, how  works. Look
at it in a browser like SeaMonkey (or perhaps Firefox; I have not tried). You
can open the examples in an editor and alter the attribute values.

Would this solve your request? If yes, then I suggest, to alter the subject
accordingly.


> 
> 3) providing the concept of "object taking no space" to LibO Math, so that
> the prime sign can be inserted without it taking any horizontal space.

I do not see the difference to way "2".

> 
> Note that 1) is what LaTeX does seamlessly. And I must admit that I am
> spoiled by LaTeX.

What does LaTeX, if you do not use a prime but a different character, for
example a "T"? Would you please attach an image, how LaTeX renders these
examples, in a large zoom?

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[Libreoffice-bugs] [Bug 104753] Missing option do have a symbol with a subscript and a prime symbol in LibO Math

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=104753

--- Comment #3 from sergio.calleg...@gmail.com ---
Note that the issue can be solved in different ways:

1) Assuring that ' is treated as a proper superscript, so that a subscript is
placed below it and not also to the side of it;

2) providing the concept of "negative space" to LibO Math, so that one can
remove the horizontal space taken by the prime sign.

3) providing the concept of "object taking no space" to LibO Math, so that the
prime sign can be inserted without it taking any horizontal space.

Note that 1) is what LaTeX does seamlessly. And I must admit that I am spoiled
by LaTeX.

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[Libreoffice-bugs] [Bug 104753] Missing option do have a symbol with a subscript and a prime symbol in LibO Math

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=104753

--- Comment #2 from sergio.calleg...@gmail.com ---
Thanks, but this too is not very satisfactory. Seems to be hackish, because it
hardwires a 1.6 that should actually depend on the relative font size that you
selected. Furthermore, the ' goes way too high.

> In what mathematical context and meaning do you need such a type setting?

I work in electronic engineering. But basically, I think that this can be
useful in many contexts. Basically, whenever one has a quantity with a
subscript and needs a prime sign to differentiate a "companion" quantity.

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[Libreoffice-bugs] [Bug 104753] Missing option do have a symbol with a subscript and a prime symbol in LibO Math

[bugzilla-daemon]

https://bugs.documentfoundation.org/show_bug.cgi?id=104753

Regina Henschel  changed:

   What|Removed |Added

 CC||rb.hensc...@t-online.de

--- Comment #1 from Regina Henschel  ---
You can workaround it by using x_1^{size*1.6 ′} and setting the spacing for
superscript to 0%.

In what mathematical context and meaning do you need such a type setting?

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