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Hi helllo,

Don't post random bits of code, instead post full a MWE that people can easily compile to see the problem.

For your current question, use the align environment provided by the amsmath package
\documentclass[a4paper,11pt]{article}

\usepackage{amsmath}

\begin{document}

\begin{align}
f ...

You could treat the input pdfs as figures, and use the 'subfig' package to create an array.

In this way you can control their position and size relative to the first input pdf.

This seems like an ugly way, but assuming you are on a unix based system, have the source tex files and are scripting so don't mind doing a few commands on each file.

For each 'input' file:
1) Use latex to create dvi a file.
2) Run "dvips -E file.dvi" on each file create a ps file with a tight ...

The "cite" package will do what you want, although you will need to slightly alter how you input multiple citations. will output [1-4]

As another option, try using the 'cases' environment together with the 'pmatrix' environment provided by the amsmath package.
\documentclass{article}

\usepackage{amsmath}

\begin{document}

\[
F^+(U) =
\begin{cases}
\begin{pmatrix}
\rho\\
\rho u\\
\rho v
\end{pmatrix} & \mbox{$x \geq 0$};\\[5ex ...

I created a custom makefile for my thesis, mainly to save time and typing. I use latex->ps->pdf, with each step including a few options/flags. Initially I had aliases for the two conversions and one to do latex;bibtex;latex;latex.

The makefile groups everything together, was a bit of an academic ...

The fancyhdr package provides a special page style for float only pages (see p14 of the manual)
http://www.ctan.org/tex-archive/macros/latex/contrib/fancyhdr/
\documentclass{article}

\usepackage{rotating}
\usepackage[english]{babel}
\usepackage{blindtext}
\usepackage{fancyhdr}

\pagestyle ...

You need to put the pagestyle outside of the float environment

No problem, welcome to the board.

Once your problem is solved, the convention is to edit the subject of your initial post to include the green tick/check symbol.

Try using the multicol package to switch from one to two columns. The second and third packages are just to provide text to show the different column layout
\documentclass{article}

\usepackage{multicol}
\usepackage[english]{babel}
\usepackage{blindtext}

\begin{document}
\blindtext

\begin ...