How can I write this equation with LibreOffice formula? At first, I do not know how to write this symbol of Hilbert space, another thing is, I do not see the option to put a limit in the symbol of direct sum like this picture. Anyone can help me?
(edit: activated screenshot)
Do you actually want to do calculations with this formula? Or, would it be sufficient to simply display an image of the formula in your document (like the image you attached to your question)?
I can always attach a picture in my document, it is not a problem. I wanted to know the formula code for putting this equation in my document. I have already got some answer. Thank you
H = stack{L # size 30 {{} oplus {}} # M=0} H_M
A bit tricky… You cannot use the oplus operator here (lots of alignment problems), so you need to enter it as a symbol (U+2a01) and declare it as unary operator
H = {nitalic oper ⨁ from {italic M=0} to{italic L} italic H_M}
it’s quite close, except for the “H”. If you are OK with something like this ℋ (U+210b) then just substitute the H with that character, otherwise you’ll need to find a font that provides that particular glyph and create a new symbol.
NOTE: to insert any of those symbols just type the corresponding unicode code and press Alt X
Thank you a lot. Can you help me to get this particular font of H. Also, I am not understanding why Unicode code is not working? what I have to do put U+210b ? I will write this thing in the Insert>Formula ? I saw it does not work ? Also I used Alt+X but no change! What can I do ?
I think TeX Gyre Chorus comes close. Which LibO version do you use? I have no problem with the Alt-X combo, which was introduced on 5.1. To insert the “oplus” symbol I just type 2a01 and then, without inserting any space or anything, press Alt-X. This works anywhere on LibO. You can also insert the symbol on Writer with the normal “insert symbol” dialogue and then copy paste it to the Math editor.
Thank you a lot. I think it will work. By the way, if I write %U+210b in insert>Formula then why it does not show the H that you talked about in the first comment. Also, Alt+X does not work to me and my version of LO is 4.2.8.2. But it is true, I can get this H in Tex Gyre chorus as you told, which is okay to me. Thank you again!
4.2 is on “end of life” since a long time. I recommend you to upgrade to, at least, version 5.4: there you’ll get not only the Alt-X trick but also OpenType support and many other improvements.
Should not it be upgraded automatically when I am running “sudo apt-get update” from the terminal ? I do it always. I thought I am using all updated version of all programs