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== Numbered Equations
The environment `[env.equation]` is automatically
numbered by default, as in the examples below.
[env.equation]
--
a^3 + b^3 = c^3
--
[env.equation]
--
\int_0^1 x^n dx = \frac{1}{n}
--
Here is how the first equation is done:
----
[env.equation]
--
a^3 + b^3 = c^3
--
----
=== Some more equations
.Pythagorean theorem
[env.equation#pyth]
--
a^2 + b^2 = c^2
--
A Fourier series:
[env.equation#fourier]
--
f(z) = \sum_{n=-\infty}^\infty e^{2\pi i n z }.
--
A matrix:
[env.equation#eq-matrix]
--
M = \left(
\begin{matrix}
1 & 2 \\
3 & 4
\end{matrix}
\right)
--
=== Titles
Equations can take a title:
.Fundamental theorem of calculus
[env.equation]
--
\frac{d}{dx} \int_a^x f(t) dt = f(x)
--
We wrote this:
----
.Fundamental theorem of calculus
[env.equation]
--
\frac{d}{dx} \int_a^x f(t) dt = f(x)
--
----
=== Suppressing numbering
Numbering can be suppresed on a per-item basis.
This gives a "bare" equation.
[env.equation%no-number ]
--
M = \left[
\begin{array}{ c c }
1 & 2 \\
3 & 4
\end{array} \right]
--
We wrote `[env.equation%no-number]`.
If numbering is suppressed but a title is present,
the title is displayed.
.Symmetric matrix
[env.equation%no-number]
--
M = \left[
\begin{array}{ c c }
1 & 2 \\
-2 & 5
\end{array} \right]
--
Here is the source:
----
.Symmetric matrix
[env.equation%no-number]
--
M = \left[
\begin{array}{ c c }
1 & 2 \\
-2 & 5
\end{array} \right]
--
----
Note: In <<eq-matrix>> we defined a matrix.
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