# Gullstrand-Painleve/Doran articles with bad Latex?

1. Sep 11, 2012

### m4r35n357

I've been intrigued for some time by the following posts, but they all have lots of Latex errors (at least for me, Firefox/Linux).
https://www.physicsforums.com/blog.php?b=580 [Broken]
https://www.physicsforums.com/blog.php?b=590 [Broken]
https://www.physicsforums.com/blog.php?b=855 [Broken]
Can anyone confirm they are broken before I make an idiot of myself in a PM, and in any case is it appropriate to PM for this sort of thing?

Last edited by a moderator: May 6, 2017
2. Sep 11, 2012

### Mentz114

I see a lot of broken Latex with FireFox

\begin{flalign} dt\,+\,\frac{\beta}{1-\beta^2}\,dr&=&d\bar{t}&=& &d\breve{t}-\,\frac{1}{1+\beta}\,dr\\[6mm] d\phi\,+\,\frac{\beta}{1-\beta^2}\,\frac{a}{(r^2+a^2)}\,dr&=&d\bar{\phi}&=& &d\breve{\phi}\,-\,\frac{1}{1+\beta}\,\frac{a}{(r^2+a^2)}\,dr \end{flalign}
This is it fixed.
\begin{align} dt\,+\,\frac{\beta}{1-\beta^2}\,dr&=d\bar{t}= d\breve{t}-\,\frac{1}{1+\beta}\,dr\\ d\phi\,+\,\frac{\beta}{1-\beta^2}\,\frac{a}{(r^2+a^2)}\,dr &= d\bar{\phi}= d\breve{\phi}\,-\,\frac{1}{1+\beta}\,\frac{a}{(r^2+a^2)}\,dr \end{align}

3. Sep 11, 2012

### m4r35n357

Heh, I am already using those equations, they seem to work just fine ;) I just wanted to see how he puts it all together, it sounded interesting, and not too far above my level. BTW it looks just as broken in Chrome.