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HP Forum Archive 21

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Including mathematical symbols in forum postings
Message #1 Posted by Nick_S on 17 Oct 2012, 3:58 a.m.

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.

      
Re: Including mathematical symbols in forum postings
Message #2 Posted by SteveH on 17 Oct 2012, 7:39 a.m.,
in response to message #1 by Nick_S

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 ∞ ∑).

      
Re: Including mathematical symbols in forum postings
Message #3 Posted by Didier Lachieze on 17 Oct 2012, 7:52 a.m.,
in response to message #1 by Nick_S

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

For example:

            
Re: Including mathematical symbols in forum postings
Message #4 Posted by Nick_S on 17 Oct 2012, 8:19 a.m.,
in response to message #3 by Didier Lachieze

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.

                  
Re: Including mathematical symbols in forum postings
Message #5 Posted by Don Shepherd on 17 Oct 2012, 3:39 p.m.,
in response to message #4 by Nick_S

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.

                        
Re: Including mathematical symbols in forum postings
Message #6 Posted by Thomas Klemm on 18 Oct 2012, 4:14 p.m.,
in response to message #5 by Don Shepherd

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

            
Re: Including mathematical symbols in forum postings
Message #7 Posted by Luiz C. Vieira (Brazil) on 17 Oct 2012, 8:29 a.m.,
in response to message #3 by Didier Lachieze

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.

      
Re: Including mathematical symbols in forum postings
Message #8 Posted by Thomas Klemm on 17 Oct 2012, 10:43 a.m.,
in response to message #1 by Nick_S

Another solution is described in this article:
1021: How to use a formula in a post

Cheers
Thomas

            
Re: Including mathematical symbols in forum postings
Message #9 Posted by Eddie W. Shore on 18 Oct 2012, 1:41 p.m.,
in response to message #8 by Thomas Klemm

Online Latex may be the way to go..

Link to Online Latex

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

Eddie

                  
Re: Including mathematical symbols in forum postings
Message #10 Posted by Walter B on 18 Oct 2012, 1:50 p.m.,
in response to message #9 by Eddie W. Shore

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

                        
Re: Including mathematical symbols in forum postings
Message #11 Posted by Maximilian Hohmann on 18 Oct 2012, 1:57 p.m.,
in response to message #10 by Walter B

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...

                              
Re: Including mathematical symbols in forum postings
Message #12 Posted by C.Ret on 18 Oct 2012, 3:12 p.m.,
in response to message #11 by Maximilian Hohmann

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...
                                    
Re: Including mathematical symbols in forum postings
Message #13 Posted by Thomas Klemm on 18 Oct 2012, 3:40 p.m.,
in response to message #12 by C.Ret

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.

                                    
Re: Including mathematical symbols in forum postings
Message #14 Posted by Eddie W. Shore on 19 Oct 2012, 12:45 a.m.,
in response to message #12 by C.Ret

So that is the secret.

Thanks C. Ret.

                              
Re: Including mathematical symbols in forum postings
Message #15 Posted by Thomas Klemm on 18 Oct 2012, 3:25 p.m.,
in response to message #11 by Maximilian Hohmann

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

<img alt="" src="data:image/gif;base64,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" />

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

Cheers
Thomas

                                    
Re: Including mathematical symbols in forum postings
Message #16 Posted by Marcus von Cube, Germany on 18 Oct 2012, 3:54 p.m.,
in response to message #15 by Thomas Klemm

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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