Is there a font that can be used for math notation? I'm thinking there isn't. If that is the case, does anyone know what the simplest route is to having nice math notation in my iPad app?
Update: Thank you for all the great responses. Looking at the current replies, would people generally recommend that if what I want to do is essentially create a feature that allows people to enter math equations intuitively then I should probably start with MathML as something I would work towards? What I mean is should I take a strategy of creating a UI that enables the user to write his/her math notation such that said notation they input gets converted into MathML (versus simply using a unicode math font which wouldn't already contain some semblance of the typesetting functionality?
I would leverage WebKit's support for MathML, or at least use a javascript library like jsMath. In general typesetting math notation in a non-webview is going to be annoying and take development time away from things that are actually relevant to the specifics of your app.
(It may also be useful to look at MathJax, which looks more modern and shiny than jsMath)
Unicode provides an amazing array of math-related characters (you can see a lot of examples here: http://tlt.its.psu.edu/suggestions/international/bylanguage/mathchart.html).
You might be able to use the StarMath font from OpenOffice.
I'm sure there are other fonts, but finding a font with the symbols is the easy part. The challenge is in the typesetting.
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I am programming a website on the subject of chemistry and for obvious reasons I also have to include structural and molecular formulas on that site. I want to have as few images as possible on the side and would therefore like to know how I can compile LaTeX code on my website, so I can show everything I could do in LaTeX itself.
Thanks in advance.
As outlined in a previous comment, Chemistry.SE has enabled mhchem in MathJax to allow the rendering of simple formula and reaction equations. The MathJax documention actually gives some directions.
As far as structures of organic molecules are concerned, I'm usually draw them using BkChem and export them as the png images.
If I understand you correctly, you would like to avoid the images themselves and not just the act of drawing. Therefore, the idea to generate the drawings from a linear representation (InChi, SMILES) using openbabel will probably not convince you.
As a matter of fact, it is possible to create structure in LaTeX using chemfig and there have been requests to support this package in MathJax. However, it seems that so far, the strong dependance of chemfig on TikZ has prevented this.
I want to build a website where people can create tests with questions and answers . I want people can type in math equation/symbol and equations in a textbox or something like that, and they will be store in database, it'also displayed on the web like image.
My idea is i will store the text user input in latex syntax and store it, then display it using MathJax, i don't know it's possible or will have better way to do this.
And a problem is in user input will have normal text with "math text" (latex), so how can i separate them and only save the latex text? Please give me some idea or suggest the way to solve it, thanks.
p/s: i'm building this site in ruby on rails, i found the gem mathjax-rails but it seem not working.
Consider building off Gollum. It is the backend for the wiki system Github uses and works fairly well with LaTex equations (currently their is a very irritating bug with less/greater than symbols, but is documented and likely will be fixed in the next release). I start using it this summer to take notes in a math classes, an example of a full page of rendered LaTex equations notes is here here.
Note: You must be logged into Github in order for the equation to render.
http://www.cs.umass.edu/~mccallum/papers/acm-queue-ie.pdf
I want to write a document that has the style like this one.
Like having a light colored background on a page, having a big header (like the EXTRACTION) shown in this link. Do you think it is possible to something like this in Latex?
I am comfortable with doing normal things in latex.
If you download and look at the document properties, it was made with InDesign CS3. Could you do this in LaTeX? Yes. The cover page is... just a cover page. If you use fancyhdr and make a page header, you can increase the header height, then lay the page header in there as an image. Try eso-pic for page backgrounds. But in all honesty, that document is kind of ugly. :D
Your best bet for a document like this is to use a desktop publishing system. A Free/Open Source Software solution would be Scribus Desktop Publishing.
Off the top of my head:
-- check out ConTeXt, strictly speaking an alternative to LaTeX but one designed for something closer to DTP than LaTeX itself;
-- LaTeX has lots of facilities for DTP-like work, a good place to start would be the newsletter on link text
-- investigate packages such as PGF/TKZ, eso-pic, newspaper.
That document smell like made with InDesign or QuarkXPress ... I guess there is a way to do it in latex but will not be straightforward at all ...
Actually it's quite feasible using LaTeX, it's just a pity that the learning curve and the technical involvement are higher than when using DTP tools like Adobe InDesign.
This explains why few people are willing to involve the required amount of time and energy into mastering LaTeX for such kind of projects, and consequently why few introductory material is available on the subject.
One notable exception is the recent workshop given by Dominik Wagenführ at Ubucon 2009 in Göttingen. Its proceedings are freely available a the bottom of the page, as well as the related source code. It's all in German but fairly easy to understand and very educational, so I'd recommand you to study it.
I want to use LaTex to write equations faster and if it is possible to export the result as a png or jpg so that it can be used on a website.
Wikipedia (and its opensource wiki engine) uses LaTeX for that, maybe there are some resources available (at least in the code, as it is opensource).
Your question is very broad. You could start with Amazon's List of Latex Books.
You might want to investigate the StackExchange site mathoverflow.net solution - you can read about here. It uses jsMath which supports a lot of LaTeX syntax.
Assuming you already know a little LateX and your primary goal is to get images, a good high-level tool is mathTeX; there are even public servers that will convert to images for you.
If you want to do everything yourself, all the tools use dvipng at bottom.
I like both MathBin.net and Roger's Online Equation Editor. The latter lets you control the quality of the output. See also this question.
try this: http://hausheer.osola.com/latex2png
Here is a small symbol reference for LaTeX. If you are looking for something more as a general introduction, you can look at "The Not So Short Introduction To LaTeX2e". If you use Inkscape, there is built in support for rendering LaTeX and there are also extensions that do the same. You can read some commentary about it here. There are also things like LaTeX to HTML converters; However, at the time I was looking at them, they were somewhat limited in what formulas they could display.
I taught myself LaTeX using the wikibook. It's fairly comprehensive as an initial guide. I've since bought The LaTeX Companion, which is a more advanced guide to in depth typesetting in LaTeX
I use http://www.artofproblemsolving.com/LaTeX/AoPS_L_TeXer.php when I need a quick equation for a web site.
There are packages that will automatically produce images from LaTeX source, but these are often either buggy or used incorrectly. Many people install them on their blogs, for example, and the images show up if you visit the blog directly but they don't show up if you view the page via a blog reader. I'm not saying these problems can't be fixed. They can, but it often takes a few tries.
I prefer just to make a gif and stick it in the page. It's low tech and reliable.
One more tip: it's a good idea to put the LaTeX source in the alt tag of the image. This helps people using screen readers. It helps you too if you need to modify the equation later.
Detextify is a great site that lets you draw a symbol, and it will pop up a list of latex commands that may match your drawing. It's quite accurate! http://detexify.kirelabs.org/classify.html
I want to experiment with an idea I have of automatically localizing software, or at least suggesting a reasonable translation if a localized string is not available.
I'm not sure this will be working satisfactorily tomorrow morning but I just wanted to play with this idea.
Does anybody know of a dictionary that is free to use, and is in an easy to parse format, that can help me automatically translate words from English to other European languages (French, German, Spanish, etc)
The FreeDict project has quite a few relatively complete dictionaries. Most are from one language to english or vice versa, but some are between two non-english languages as well.
I don't know any dictionary but would like to point something out. You have to bear in mind that translating is not a direct word to word technique in any sense. The Rules of the language change as well and thus leave sentences unreadable. This is why even companies like Google have trouble making good translation software. Context is very hard to programmatically detect and context means everything in choosing the right word, the right structure and so on.
Maybe use a Translation API, if there is one. Google only seem to do a JavaScript API for Language.
You can't even expect to get a reasonable translation with an automatic method. Translating full texts is too hard for a computer to handle completely correct, translating short phrases correctly is impossible.
Take for example the simple text "Open", without a context it's not even possible to tell if it's a verb or an adjective. I know that at least in german that the verb and the adjective translates into two different words.
Also, computer specific concepts often borrow words from similar concepts outside the computer sphere. Those concepts often have a specific translation, but an automatic translation would sometimes try to translate it as if it was the original meaning, which can give you very strange translations.
After a while of searching i solved the problem by myself start to create my own dictionary. I do a lot of translations in my free time. In the beginning it is really boring work...but after a while you get an really good dicitionary. Some friends of mine using it too...so we all benefit from every new Word we translate.