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Including mathematical symbols in forum postings



#5

Is there any way to include the HTML codes to obtain mathematical symbols e.g., π ∞ or ∑ etc., so that we can see the actual symbols in our postings?

Nick

Edited: 17 Oct 2012, 3:59 a.m.


#6

I was hoping that one can just enter the Unicode characters for these directly but the forum preview renders them as html codes (e.g. these are Unicode symbols π ∞ ∑).

#7

One way could be to use GIF/PNG images such as the ones HERE.

For example:


#8

That is a clever solution, but fragile. If the MoHPC web site could duplicate the PNG symbol web page locally then links to symbols in postings would not break if the original site changes or disappears.

The copyright terms of the original page seem to allow this:
"Copyright Terms

All images and text displayed on this web page are placed in the public domain by the author, per the Creative Commons Public Domain Dedication [external]."

Nick

Edited: 17 Oct 2012, 8:20 a.m.


#9

Quote:
If the MoHPC web site could duplicate the PNG symbol web page locally then links to symbols in postings would not break if the original site changes or disappears.

Yeah, the MoHPC does have many of those symbols here: http://www.hpmuseum.org/software/

Many MoHPC articles have used these symbols in the past.


#10

arrowl.gif       
delta.gif
deltap.gif
diamond.gif
divide.gif
dwnarrow.gif
dwnquest.gif
exch.gif
exchi.gif
gto.gif
integral.gif
interg.gif
lesseq.gif
meanx.gif
noteq.gif
notequal.gif
pi.gif
pict0.jpg
rdelta.gif
rolldn.gif
rollup.gif
rtbldarw.gif
sigma.gif
sqrt.gif
stee.gif
sum.gif
summi.gif
sumpl.gif
symangle.gif
symdel.gif
symdelc.gif
symgamma.gif
symint.gif
symnoteq.gif
symphic.gif
sympi.gif
sympic.gif
symsqrt.gif
symsum.gif
symsumm.gif
symsump.gif
symsums.gif
symtheta.gif
symthetc.gif
uline.gif
uparrow.gif
yhat.gif

I hope this list makes it easier to choose.

Cheers

Thomas

#11

Hi.

What a finding! C'est magnifique! Thanks for sharing, I was not aware of that - and the page was last revised in January 2008... (reminds me the deep web and the Onion browser; what the f*** do we know) I for one have now a pot of gold, will use this resource pretty often, not only here but elsewhere.

Merci!

Luiz (Brazil)

Edited: 17 Oct 2012, 8:31 a.m.

#12

Another solution is described in this article:

1021: How to use a formula in a post

Cheers

Thomas


#13

Online Latex may be the way to go..

Link to Online Latex

I do not know how to import images onto a message. :(

Eddie


#14

There a button called (Image) right below of the editing window ;-)


#15

Quote:
There a button called (Image) right below of the editing window ;-)

Yes, but you must store that picture somewhere in the web and post a link here. Unless this forum has a hidden function that allows users to import pictures...


#16

Quote:
Yes, but you must store that picture somewhere in the web and post a link here. Unless this forum has a hidden function that allows users to import pictures...


#17

It's only now that I realize that you can select URL encoded in the box at the bottom. Cool!

Thanks for pointing that out.

Thomas

PS: You can safely ignore my post bellow. I didn't understand you correctly.


Quote:
and insert it as an image

Not exactly. It's a link to latex.codecogs.com. When the site is down the image can't be shown. Embedding it as base64 encoded data URI would make it permanent.

Kind regards

Thomas

PS: IIRC it's possible to get access to an ftp-account and upload files to this forum from where they can be linked to.

Edited: 18 Oct 2012, 3:51 p.m.

#18

So that is the secret.


Thanks C. Ret.

#19

You could save the image and convert it into a base64 string:

<img alt="" src="data:image/gif;base64,R0lGODlhVQASAIQAAP///wAAAKCgoLCwsMDAwJCQkPDw8FBQUNDQ0ICAgODg4BAQEEBAQCAgIHBwcGBgYDAwMAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAACH5BAEAAAAALAAAAABVABIAAAX+ICCOpKGQaKqubOu+7jDAdG3feK7vtHKKhGDQwCsaSQgEA2BwJBiPR4J4BCAgVdJAQCggWARFA0AgDwplWNhFSCQCWdHgMYL8VI7C6GFIpF9+anBxEHoiBw4sDQp6BlgHMzCBLwSDWQF/TyMCA12HAkQFegUJNJNslkeVmXAGB18ApzuyYKkpBwy5uruJKKsjbwAHpYdUPLQrlXG/Im8KAVwyxje7DA0QvMm2RcyxmAtxzX8tyiwIQuhCsCWYwBAESyPTs+O1LW74+W4CKg38IlEAjBFhoMC8HMhUlMuSgI6IBmUQ+NlyEGG9FG0OBHByx4iDMgX+hRM30oYCAhUHsyhIWfJFCAA7" />

Unfortunately we can't include an image using a Data URI.

Cheers

Thomas


#20

The problem here is that the forum software is a little bit too smart and tries to check the URL for consistency. I tried to embed your code but it was posted as is, not as an image.


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