The Museum of HP Calculators

HP Forum Archive 21

 Including mathematical symbols in forum postingsMessage #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 postingsMessage #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 postingsMessage #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 postingsMessage #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 postingsMessage #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 postingsMessage #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 postingsMessage #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 postingsMessage #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 postingsMessage #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.. I do not know how to import images onto a message. :( Eddie

 Re: Including mathematical symbols in forum postingsMessage #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 postingsMessage #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 postingsMessage #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... $\emph{No, no more, you simply have to copy \textbf{\mathbf{URL Encoded}} and insert it as an image.}$

 Re: Including mathematical symbols in forum postingsMessage #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 postingsMessage #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. $e^{i \pi}+1=0$ Thanks C. Ret.

 Re: Including mathematical symbols in forum postingsMessage #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: ``` ``` Unfortunately we can't include an image using a Data URI. Cheers Thomas

 Re: Including mathematical symbols in forum postingsMessage #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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