Andreas Leha <andreas.l...@med.uni-goettingen.de> writes: > Hi Rainer, > > Rainer M Krug <rai...@krugs.de> writes: >> Hi >> >> I would need in a document several equations which are aligned as in >> http://tex.stackexchange.com/a/167908/6941 >> >> How can I use the following latex formula in orgmode? >> >> \begin{proof} The proof is a follows: >> \begin{align} >> (x+y)^3&=(x+y)(x+y)^2\\ >> &=(x+y)(x^2+2xy+y^2)\\ >> &=x^3+3x^2y+3xy^3+x^3.\qedhere >> \end{align} >> \end{proof} >> >> >> I have effectrively >> >> #+LATEX_HEADER: \usepackage{amsmath} >> >> * The equations >> >> \begin{equation} >> \begin{align} >> (x+y)^3&=(x+y)(x+y)^2\\ >> &=(x+y)(x^2+2xy+y^2)\\ >> &=x^3+3x^2y+3xy^3+x^3.\qedhere >> \end{align} >> \end{equation} >> >> >> but with latex fragment preview (C-c C-x C-l) I only get an empty frame. >> >> How can use this align environment in org? > > This seems to a problem with your setup of preview latex. It > should work just fine.
But it doesn't:
- I started emacs with -Q
- executed the following in scratch to load newest org
--8<---------------cut here---------------start------------->8---
;; Load up Org Mode and Org Babel for elisp embedded in Org Mode files
(add-to-list 'load-path "~/.emacs.d/org-mode/lisp")
(add-to-list 'load-path "~/.emacs.d/org-mode/contrib/lisp")
;; load up Org-mode and Org-babel
(require 'org)
--8<---------------cut here---------------end--------------->8---
- pasted this in an org buffer
--8<---------------cut here---------------start------------->8---
#+LaTeX_header: \usepackage{amsmath} %% needed explicitely for org-preview-latex
* General conditions
The general conditions for all parametrizations are the following:
\begin{equation}
x=\sqrt{b}
\end{equation}
\begin{equation}
\begin{align*}
(x+y)^3&=(x+y)(x+y)^2\\
&=(x+y)(x^2+2xy+y^2)\\
&=x^3+3x^2y+3xy^3+x^3.\qedhere
\end{align*}
\end{equation}
\begin{eqnarray*}
\hat{f}(x) & \propto & \sum_{\nu} \frac{|F(\nu)H(\nu)|^2}{|N(\nu)|^2}
\frac{G(\nu)}{H(\nu)} e^{\frac{2 \pi i \nu x}{N}}\\
& \propto & \sum_{\nu} \frac{|F(\nu)|^2}{|N(\nu)|^2} H(\nu) H^*(\nu)
\frac{G(\nu)}{H(\nu)} e^{\frac{2 \pi i \nu x}{N}}\\
& \propto & \sum_{\nu} H^*(\nu) G(\nu) e^{\frac{2 \pi i \nu x}{N}}
\end{eqnarray*}
--8<---------------cut here---------------end--------------->8---
- did C-c C-x C-l (which runs (org-preview-latex-fragment)) on each
formula and I got the attached screenshot [1]
,----
| Org-mode version 8.3.1 (release_8.3.1-283-gf6187d @
/Users/rainerkrug/.emacs.d/org-mode/lisp/)
| GNU Emacs 25.0.50.1 (x86_64-apple-darwin14.5.0, NS appkit-1348.17 Version
10.10.5 (Build 14F27)) of 2015-09-29
`----
to make sure, I emptied the ltxpng folder - still the same.
Could somebody confirm this or give me an idea how I can debug this?
Rainer
>
> For me the following org file works as expected -- also with
> previewing the equation.
>
> #+LaTeX_header: \usepackage{amsmath} %% needed explicitely for
> org-preview-latex
>
>
> * Test align
>
> \begin{align}
> (x+y)^3&=(x+y)(x+y)^2\\
> &=(x+y)(x^2+2xy+y^2)\\
> &=x^3+3x^2y+3xy^3+x^3.\qedhere
> \end{align}
>
> I do not seem to have any special setup for previewing latex,
> though...
>
> Sorry to be of no further help.
>
> Regards,
> Andreas
>
>
Footnotes:
[1] https://www.dropbox.com/s/z41qyzwakx9yby0/Screenshot.png?dl=0
--
Rainer M. Krug, PhD (Conservation Ecology, SUN), MSc (Conservation Biology,
UCT), Dipl. Phys. (Germany)
Centre of Excellence for Invasion Biology
Stellenbosch University
South Africa
Tel : +33 - (0)9 53 10 27 44
Cell: +33 - (0)6 85 62 59 98
Fax : +33 - (0)9 58 10 27 44
Fax (D): +49 - (0)3 21 21 25 22 44
email: rai...@krugs.de
Skype: RMkrug
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