There are few differences between REVTeX v3.1 and v3.0:
Here are the differences between REVTeX v3.1 and versions <3.0.
\documentstyle is different. The main style is now
revtex, and aps is a mandatory style option for APS
authors. Other
style options are eqsecnum (to number equations by section),
preprint (to get double-spaced output for submission purposes),
tighten (to get single-spaced output with the preprint option),
and amsfonts and amssymb (see below).
There are also style options for each APS journal: pra, prb,
prc, prd,
pre, prl, and rmp for Physical
Review A, B, C, D, E, Letters,
and Reviews of Modern Physics, respectively. pra is the
default.
The prb
option gives superscript
reference citations, as is the style for Physical Review B.
Other than this, there are no substantial differences in the journal options.
Please do not use the prb option unless you
will be submitting to Physical Review B.
The prl option yields a slightly different line spacing for accurate
PRL length estimates.
The floats style option enables LaTeX-style floating figures and
tables---it is not for use with files to be submitted to the
APS. Similarly the twocolumn style option is for personal use, and not
for use in submitted files.
\tightenlines command is now called \tighten.
The tighten style option can be used to get a single-spaced
preprint.
\label{#1} command
after \begin{mathletters}. This allows you to
reference the general number of the equations in the
mathletters environment. For example, if
\begin{mathletters}
\label{eq:all} % note location
\begin{equation}
E=mc^2,\label{eq:a}
\end{equation}
\begin{equation}
E=mc^2,\label{eq:b}
\end{equation}
\begin{equation}
E=mc^2,\label{eq:c}
\end{equation}
\end{mathletters}
gives the output
then Eq.\ (\ref{eq:all}) gives ``Eq. (4)''.
\nonum command is no longer used. You can get unnumbered
section headings by using the ``star form'' of the command; e.g.,
\section*{Unnumbered section}
This is normal LaTeX practice. Appendix headings used to be set with the
\appendix{#1} and \unletteredappendix{#1} commands. The
normal LaTeX convention is now used: When you wish to start the
appendix(es) use the \appendix command (no argument). Then
\section{#1} will give an appendix heading and \section*{#1}
gives an unlettered appendix. All numbering, labeling, and
cross-referencing remain the same.
\begin{figure}
\caption{Here is the caption.\label{xxx}}
\end{figure}
Note that the label can be inside the caption or after it, as long as it is
inside the figure environment and does not come before the caption.
! Argument of \@caption has an extra }generally indicates that a command in a caption must be preceded by the
\protect command.
\protect will need to be used much more often, unfortunately.
Specifically, \\ and \ref, along with other fragile commands,
will need to be protected in section heads and captions.
\FL and \FR commands still flush
equations left and right, repectively, in the column, but should be needed
only occasionally. This mimics the style of how the equations will appear in the journal.
amsfonts and
amssymb style options. These work similar on both LaTeX's normal
font macros (OFSS) and the so-called NFSS. You do not need to know what the
OFSS and NFSS are. (See Sec. vii if you are curious.)
The amsfonts option will define the \frak and \Bbb
commands to switch to the Fraktur and Blackboard Bold fonts, respectively.
Fraktur characters will come out bold in a bbox (see below), Blackboard
Bold will not. The amsfonts option also adds support for bold math
letters and symbols in smaller sizes in galley style and in superscripts
when a bbox is used. For example, $^{\bbox{\pi}}$ gives a bold
lowercase pi in the superscript position. \bbox{#1} is explained
below.
The amssymb option gives all the capabilities of the amsfonts
option, but also defines names for all the extra symbols in the AMSFonts.
See Sec. vii for font details.
\bbox{#1} command will give bold output of #1 in
math mode. You can use it to get bold greek characters---upper- and
lowercase---and other symbols. It is still easier to use \bf to get
upright Latin letters in boldface. How much comes out bold and in how many
places you get bold output depends on how many fonts you have installed.
Using the amsfonts option will automatically enable bold Fraktur in
a bbox and will use the extra AMS Computer Modern math and symbol fonts for
bold in superscripts and smaller sizes. The following will come out bold in
bboxes: normal math italic letters, numbers, Greek letters (uppercase and
lowercase), small bracketing and operators, \cal, and \frak.
See Sec. viiB.
\text{#1} command will print #1 as regular text
output in math. In particular, you will get hyphens instead of minus signs.
Used in a superscript, you will get the correct size. See Sec.\
vG.
\bf command in superscripts, you will get a
correctly sized character.
/ in the \case command is now optional. Either
\case{1}/{2} or \case{1}{2} will work. Our hope is that the
latter, more usual construct will become the norm.
\tablenote{#1}, \tablenotetext{#1},
and \tablenotemark{#1}. These commands work in direct analogy to the
regular footnoting commands in LaTeX. They should be used only in
tables, and the notes will come out at the bottom of the table in which
they appear. See apssamp.tex for instructions and examples.
d in a tabular specification will create a column centered on
the decimal points of the entries. See Sec. vL for details;
see apssamp.tex for examples. \dec and \setdec should not be
used.
were called \alt,\agt in
previous versions of REVTeX . These symbols are now called
\lesssim and \gtrsim, for compatibility with normal AMSFonts
notation.
\tensor (double-headed
overarrow), \overdots (triple overdots), \overstar (star),
\overcirc (circle), \loarrow (left-going overarrow), and
\roarrow (right-going overarrow). They scale correctly in
superscripts. See Appendix A for examples.
prsty.bst,
rmp.bst, that can be used
to prepare bibliographies automatically, as explained in Lamport's book.
\bibitem and \cite mechanisms. See Sec.\
vJ.
\twocolumn, floats, etc. You
cannot use these for files that you submit to the APS; they are added for
your personal use. Please let us know of any incompatibilities.
oldlfont.sty active. Please let us know if you have any
problems in this area. And don't worry if you don't know what the OFSS and
NFSS are. (See Sec. vii if you are curious.)