Guide to LaTeX (4th Edition) (Tools and Techniques

4.6. Tabulator stops 81
which also increments the necessary counter and generates the proper
number. The above examples were produced with
\newtheorem{theorem}{Theorem} \newtheorem{axiom}{Axiom}[chapter]
. . . . . . . . . . . . . . . .
\begin{theorem}[Balzano--Weierstrass] Every .... \end{theorem}
\begin{axiom} The natural numbers form ........... \end{axiom}
The optional extra title also appears in bold face within parentheses ( )
following the running number.
Occasionally a structure is not numbered on its own but together with
another structure. This can be included in the definition with another
optional argument
\newtheorem{struct type}[num like]{struct name}
where num like is the name of an existing theorem structure that shares
the same counter. Thus by defining \newtheorem{subthrm}[theorem]
{Sub-Theorem}, the two structures theorem and subthrm will be numbered
as a single series: Theorem 1, Sub-Theorem 2, Sub-Theorem 3,
Theorem 4, and so on.
For more powerful theorem tools, see the A M S amsthm package (Section
12.3.1) and the theorem package in the tools collection (Section B.5.4).
4.6 Tabulator stops
4.6.1 Basics
On a typewriter it is possible to set tabulator stops at various positions
within a line; then by pressing the tab key the print head or carriage jumps
to the next tab location.
A similar possibility exists in L AT E X with the tabbing environment:
\begin{tabbing} lines \end{tabbing}
One can think of the set tab stops as being numbered from left to right.
At the beginning of the tabbing environment, no tabs are set, except for
the left border, which is called the zeroth tab stop. The stops can be set
at any spot within a line with the command \=, and a line is terminated
by the \\ command:
Here is the \=first tab stop, followed by\= the second\\
sets the first tab stop after the blank following the word the, and the
second immediately after the word by.
After the tab stops have been set in this way, one can jump to each of
the stops in the subsequent lines, starting from the left margin, with the
command \>. A new line is started with the usual \\ command.